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  • 351.
    Börstler, Jürgen
    et al.
    Umeå universitet, Institutionen för datavetenskap.
    Caspersen, Michael E.
    Nordström, Marie
    Umeå universitet, Institutionen för datavetenskap.
    Beauty and the Beast--Toward a Measurement Framework for Example Program Quality2007Rapport (Annet vitenskapelig)
  • 352.
    Börstler, Jürgen
    et al.
    Umeå universitet, Institutionen för datavetenskap.
    Christensen, Henrik B
    Nordström, Marie
    Umeå universitet, Institutionen för datavetenskap.
    Kallin Westin, Lena
    Umeå universitet, Institutionen för datavetenskap.
    Moström, Jan Erik
    Umeå universitet, Institutionen för datavetenskap.
    Caspersen, Michael E
    Evaluating OO Example Programs for CS12008Konferansepaper (Fagfellevurdert)
  • 353.
    Börstler, Jürgen
    et al.
    Umeå universitet, Institutionen för datavetenskap.
    Dranidis, Dimitris
    Ramollari, Ervin
    Trapp, Sonja
    Heintz, Matthias
    Weber, Sebastian
    Sharing and discussing UML modeling exercises in a PLE2010Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We present courseware for UML/SysML modelling that supports collaborative learning at a distance. Learners can solve interactive modelling exercises and discuss their solutions. First evaluations show promising results.

  • 354.
    Börstler, Jürgen
    et al.
    Umeå universitet, Institutionen för datavetenskap.
    Hadar, Irit
    Eleventh workshop on pedagogies and tools for the teaching and learning of object-oriented concepts2008Inngår i: Object-oriented technology. ECOOP 2007 workshop reader: ECOOP 2007 workshops, Berlin, Germany, July 30-31, 2007, final reports / [ed] Michael Cebulla, Berlin: Springer , 2008, s. 182-192Kapittel i bok, del av antologi (Annet vitenskapelig)
    Abstract [en]

    This report summarizes the results of the eleventh workshop on pedagogies and tools for the teaching and learning of object-oriented concepts. The focus of this year's workshop was on desirable properties of examples and the usage of simple tools. The workshop gathered 17 participants, all from academia, from 7 different countries.

  • 355.
    Börstler, Jürgen
    et al.
    Umeå universitet, Institutionen för datavetenskap.
    Hall, Mark S
    University of Wisconsin.
    Nordström, Marie
    Umeå universitet, Institutionen för datavetenskap.
    Paterson, James H
    Glasgow Caledonian University.
    Sanders, Kate
    Rhode Island College.
    Schulte, Carsten
    Freie Universität Berlin.
    Thomas, Lynda
    Aberystwyth University.
    An evaluation of object oriented example programs in introductory programming textbooks2009Inngår i: SIGCSE Bulletin inroads, ISSN 0097-8418, Vol. 41, nr 4, s. 126-143Artikkel i tidsskrift (Fagfellevurdert)
  • 356.
    Börstler, Jürgen
    et al.
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Hilburn, Thomas B.
    Team Projects in Computing Education2015Inngår i: ACM Transactions on Computing Education, ISSN 1946-6226, E-ISSN 1946-6226, Vol. 15, nr 4, s. 16:1-16:4, artikkel-id 16Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    Team projects are a way to expose students to conflicting project objectives, and "[t]here should be a strong real-world element … to ensure that the experience is realistic" [ACM/IEEE-CS 2015b]. Team projects provide students an opportunity to put their education into practice and prepare them for their professional careers. The aim of this special issue is to collect and share evidence about the state-of-practice of team projects in computing education and to help educators in designing and running team projects. From a record number of 69 submitted abstracts, 19 were invited to submit a full paper. Finally, nine papers were accepted for publication in this and a subsequent issue. The articles presented in the present issue cover the following topics: real projects for real clients, open source projects, multidisciplinary team projects, student and team assessment, and cognitive and psychological aspects of team projects.

  • 357.
    Börstler, Jürgen
    et al.
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Hilburn, Thomas B.
    Team Projects in Computing Education II2016Inngår i: ACM Transactions on Computing Education, ISSN 1946-6226, E-ISSN 1946-6226, Vol. 16, nr 2, s. 4:1-4:4, artikkel-id 4Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    Team projects are a way to expose students to conflicting project objectives, and "[t]here should be a strong real-world element … to ensure that the experience is realistic" [ACM/IEEE-CS 2015b]. Team projects provide students an opportunity to put their education into practice and prepare them for their professional careers. The aim of this special issue is to collect and share evidence about the state-of-practice of team projects in computing education and to help educators in designing and running team projects. From a record number of 69 submitted abstracts, 19 were invited to submit a full paper. Finally, nine papers were accepted for publication in this and a subsequent issue. The articles presented in the present issue cover the following topics: real projects for real clients, open source projects, multidisciplinary team projects, student and team assessment, and cognitive and psychological aspects of team projects.

  • 358.
    Börstler, Jürgen
    et al.
    Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation.
    Kuzniarz, Ludwik
    Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation.
    Alphonse, Carl
    Sanders, Bill
    Smialek, Michal
    Teaching Software Modeling in Computing Curricula2012Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Modeling is a key skill in software development. The ability to develop, manipulate and understand models for software is therefore an important learning objective in many CS/SE courses. In this working group, we investigated how and when (software) modeling is taught to help us better understand the key issues in teaching (software) modeling. Several shortcomings were found in common curricula, both in their understanding of the term "modeling" and in how they address its teaching. This WG report summarizes the fi ndings and formulates recommendations on the inclusion of software modeling courses in future CS/SE curricula.

  • 359.
    Börstler, Jürgen
    et al.
    Umeå universitet, Institutionen för datavetenskap.
    Michiels, Isabel
    ECOOP 2004 Workshop Report: Eigth Workshop on Pedagogies and Tools for the Teaching and Learning of Object-Oriented Concepts2004Inngår i: Object-Oriented Technology: ECOOP 2004 Workshop Reader, Springer , 2004, s. 36-48Kapittel i bok, del av antologi (Annet vitenskapelig)
  • 360.
    Börstler, Jürgen
    et al.
    Umeå universitet, Institutionen för datavetenskap.
    Michiels, Isabel
    Bruce, Kim
    Lindholm, Morten
    Ninth Workshop on Pedagogies and Tools for the Teaching and Learning of Object-Oriented Concepts2006Inngår i: ECOOP 2005 Workshop Reader, Springer , 2006Kapittel i bok, del av antologi (Annet vitenskapelig)
  • 361.
    Börstler, Jürgen
    et al.
    Umeå universitet, Institutionen för datavetenskap.
    Nordström, Marie
    Umeå universitet, Institutionen för datavetenskap.
    Kallin Westin, Lena
    Umeå universitet, Institutionen för datavetenskap.
    Moström, Jan Erik
    Umeå universitet, Institutionen för datavetenskap.
    Christensen, Henrik B.
    Bennedsen, Jens
    An Evaluation Instrument for Object-Oriented Example Programs for Novices2008Rapport (Annet vitenskapelig)
  • 362.
    Börstler, Jürgen
    et al.
    Umeå universitet, Institutionen för datavetenskap.
    Nordström, Marie
    Umeå universitet, Institutionen för datavetenskap.
    Kallin Westin, Lena
    Umeå universitet, Institutionen för datavetenskap.
    Moström, Jan Erik
    Umeå universitet, Institutionen för datavetenskap.
    Eliasson, Johan
    Umeå universitet, Institutionen för datavetenskap.
    Transitioning to OOP/Java: A never ending story2008Inngår i: Reflections on the teaching of programming, Springer , 2008, s. 80-97Kapittel i bok, del av antologi (Fagfellevurdert)
  • 363.
    Börstler, Jürgen
    et al.
    Umeå universitet, Institutionen för datavetenskap.
    Nordström, Marie
    Umeå universitet, Institutionen för datavetenskap.
    Paterson, James H
    Glasgow Caledonian University, Scotland, UK.
    On the quality of examples in introductory Java textbooks2011Inngår i: ACM Transactions on Computing Education, ISSN 1946-6226, E-ISSN 1946-6226, Vol. 11, nr 1, s. 1-21, artikkel-id 3Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Example programs play an important role in the teaching and learning of programming. Students as well as teachers rank examples as the most important resources for learning to program. Ex- ample programs work as role models and must therefore always be consistent with the principles and rules we are teaching.

    However, it is difficult to find or develop examples that are fully faithful to all principles and guidelines of the object-oriented paradigm and also follow general pedagogical principles and practices. Unless students are able to engage with good examples, they will not be able to tell desirable from undesirable properties in their own and others’ programs.

    In this paper we report on a study in which experienced educators evaluated the quality of object-oriented example programs for novices from popular Java textbooks. The evaluation was accomplished using an on-line checklist that elicited responses on the technical, object-oriented, and didactic quality of examples.

    In total 25 reviewers contributed 215 reviews to our data set, based on 38 example programs from 13 common introductory programming textbooks. Results show that the evaluation instru- ment is reliable in terms of inter-rater agreement. Overall, example quality was not as good as one might expect from common textbooks, in particular regarding certain object-oriented properties.

    We conclude that educators should be careful when taking examples straight out of a textbook.

  • 364.
    Börstler, Jürgen
    et al.
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Paech, Barbara
    The Role of Method Chains and Comments in Software Readability and Comprehension – An Experiment2016Inngår i: IEEE Transactions on Software Engineering, ISSN 0098-5589, E-ISSN 1939-3520, Vol. 42, nr 9, s. 886-898Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Software readability and comprehension are important factors in software maintenance. There is a large body of research on software measurement, but the actual factors that make software easier to read or easier to comprehend are not well understood. In the present study, we investigate the role of method chains and code comments in software readability and comprehension. Our analysis comprises data from 104 students with varying programming experience. Readability and comprehension were measured by perceived readability, reading time and performance on a simple cloze test. Regarding perceived readability, our results show statistically significant differences between comment variants, but not between method chain variants. Regarding comprehension, there are no significant differences between method chain or comment variants. Student groups with low and high experience, respectively, show significant differences in perceived readability and performance on the cloze tests. Our results do not show any significant relationships between perceived readability and the other measures taken in the present study. Perceived readability might therefore be insufficient as the sole measure of software readability or comprehension. We also did not find any statistically significant relationships between size and perceived readability, reading time and comprehension.

  • 365.
    Börstler, Jürgen
    et al.
    Umeå universitet, Institutionen för datavetenskap.
    Schulte, Carsten
    Teaching Object Oriented Modelling with CRC Cards and Roleplaying Games2005Konferansepaper (Fagfellevurdert)
  • 366.
    Börstler, Jürgen
    et al.
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Störrle, Harald
    QAware GmbH, DEU.
    Toll, Daniel
    Linné University, SWE.
    van Assema, Jelle
    University of Amsterdam, NLD.
    Duran, Rodrigo
    Aalto University, FIN.
    Hooshangi, Sara
    George Washington University, USA.
    Jeuring, Johan
    Utrecht University, NLD.
    Keuning, Hieke
    Windesheim University of Applied Sciences, NLD.
    Kleiner, Carsten
    University of Applied Sciences & Arts Hannover, DEU.
    MacKellar, Bonnie
    St John’s University, USA.
    I know it when I see it: Perceptions of Code Quality ITiCSE'17 Working Group Report2017Inngår i: ITICSE-WGR'17: PROCEEDINGS OF THE 2017 ITICSE CONFERENCE WORKING GROUP REPORTS, ACM Digital Library, 2017, s. 70-85Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Context. Code quality is a key issue in software development. The ability to develop high quality software is therefore a key learning goal of computing programs. However, there are no universally accepted measures to assess the quality of code and current standards are considered weak. Furthermore, there are many facets to code quality. Defining and explaining the concept of code quality is therefore a challenge faced by many educators.

    Objectives. In this working group, we investigated code quality as perceived by students, educators, and professional developers, in particular, the differences in their views of code quality and which quality aspects they consider as more or less important. Furthermore, we investigated their sources for information about code quality and its assessment.

    Methods. We interviewed 34 students, educators and professional developers regarding their perceptions of code quality. For the interviews they brought along code from their own experience to discuss and exemplify code quality.

    Results. There was no common definition of code quality among or within these groups. Quality was mostly described in terms of indicators that could measure an aspect of code quality. Among these indicators, readability was named most frequently by all groups. The groups showed significant differences in the sources they use for learning about code quality with education ranked lowest in all groups.

    Conclusions. Code quality should be discussed more thoroughly in educational programs.

  • 367.
    Callele, David
    et al.
    Experience First Design Inc., CAN.
    Dueck, Philip
    Experience First Design Inc., CAN.
    Wnuk, Krzysztof
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Hynninen, Peitsa
    Aalto University Espoo, FIN.
    Experience requirements in video games definition and testability2015Inngår i: Requirements Engineering Conference (RE), 2015 IEEE 23rd International, IEEE, 2015Konferansepaper (Fagfellevurdert)
    Abstract [en]

    A properly formed requirement is testable, a necessity for ensuring that design goals are met. While challenging in productivity applications, entertainment applications such as games compound the problem due to their subjective nature. We report here on our efforts to create testable experience requirements, the associated scope challenges and challenges with test design and result interpretation. We further report on issues experienced when performing focus group testing and provide practitioner guidance.

  • 368.
    Callele, David
    et al.
    University of Saskatchewan, CAN.
    Penzenstadler, Birgit
    California State University Long Beach, USA.
    Wnuk, Krzysztof
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Public policy challenges: An RE perspective2018Inngår i: CEUR Workshop Proceedings / [ed] Chitchyan R.,Venters C.C.,Penzenstadler B., CEUR-WS , 2018, s. 24-33Konferansepaper (Fagfellevurdert)
    Abstract [en]

    In this perspective paper, we investigate the parallels between public policy and IT projects from the perspective of traditional RE practice. Using the mainstream media as an information source (as would an average citizen), over a period of approximately one year we captured documents that presented analyses of public policy issues. The documents were categorized into eight topic areas, then analyzed to identify patterns that RE practitioners would recognize. We found evidence of policy failures that parallel project failures traceable to requirements engineering problems. Our analysis revealed evidence of bias across all stakeholder groups, similar to the rise of the “beliefs over facts” phenomenon often associated with “fake news”. We also found substantial evidence of unintended consequences due to inadequate problem scoping, terminology definition, domain knowledge, and stakeholder identification and engagement. Further, ideological motivations were found to affect constraint definitions resulting in solution spaces that may approach locally optimal but may not be globally optimal. Public policy addresses societal issues; our analysis supports our conclusion that RE techniques could be utilized to support policy creation and implementation. © 2018 SPIE. All rights reserved.

  • 369.
    Callele, David
    et al.
    University of Saskatchewan, CAN.
    Wnuk, Krzysztof
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    A Process for Product and Service Definition2016Inngår i: 9th International Workshop on Software Product Management (IWSPM 2016), IEEE, 2016, s. 322-327Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This short paper presents an iterative and incrementalprocess to improve the probability that the product or service definition leading to requirements and implementation is both representative of the market needs and has a reasonable expecta-tion of a financially viable business model. Rather than a relative-ly linear process wherein marketing delivers a product definition to the development team, this process ensures that all assump-tions are validated during the definition stage and that all team members are engaged. The process balances the need to address current challenges against future opportunities, providing short-term customer satisfaction (and justification for purchasing or adoption) and a coherent vision for future development efforts (and maintaining and growing the customer base). The process is applied to a case in the agriculture commodities sector.

  • 370.
    Callele, David
    et al.
    University of Saskatchewan, CAN.
    Wnuk, Krzysztof
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Penzenstadler, Birgit
    California State University Long Beach, USA.
    New Frontiers for Requirements Engineering2017Inngår i: 2017 IEEE 25th International Requirements Engineering Conference, RE 2017, Institute of Electrical and Electronics Engineers Inc. , 2017, s. 184-193, artikkel-id 8048904Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Requirements Engineering (RE) has grown from its humble beginnings to embrace a wide variety of techniques, drawn from many disciplines, and the diversity of tasks currently performed under the label of RE has grown beyond that encom-passed by software development. We briefly review how RE has evolved and observe that RE is now a collection of best practices for pragmatic, outcome-focused critical thinking-A pplicable to any domain. We discuss an alternative perspective on, and de-scription of, the discipline of RE and advocate for the evolution of RE toward a discipline that supports the application of RE prac-tice to any domain. We call upon RE practitioners to proactively engage in alternative domains and call upon researchers that adopt practices from other domains to actively engage with their inspiring domains. For both, we ask that they report upon their experience so that we can continue to expand RE frontiers. © 2017 IEEE.

  • 371.
    Cardellini, Valeria
    et al.
    Universita degli Studi di Roma Tor Vergata, ITA.
    Casalicchio, Emiliano
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för datalogi och datorsystemteknik.
    Grassi, Vincenzo
    Universita degli Studi di Roma Tor Vergata, ITA.
    Iannucci, Stefano
    Universita degli Studi di Roma Tor Vergata, ITA.
    Lo Presti, F.
    Universita degli Studi di Roma Tor Vergata, ITA.
    Mirandola, Raffaela
    Politecnico di Milano, ITA.
    MOSES: A platform for experimenting with qos-driven self-adaptation policies for service oriented systems2017Inngår i: Lecture Notes in Computer Science, Springer Verlag , 2017, Vol. 9640, s. 409-433Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Architecting software systems according to the service-oriented paradigm, and designing runtime self-adaptable systems are two relevant research areas in today’s software engineering. In this chapter we present MOSES, a software platform supporting QoS-driven adaptation of service-oriented systems. It has been conceived for service-oriented systems architected as composite services that receive requests generated by different classes of users. MOSES integrates within a unified framework different adaptation mechanisms. In this way it achieves a greater flexibility in facing various operating environments and the possibly conflicting QoS requirements of several concurrent users. Besides providing its own self-adaptation functionalities, MOSES lends itself to the experimentation of alternative approaches to QoS-driven adaptation of service-oriented systems thanks to its modular architecture. © Springer International Publishing AG 2017.

  • 372.
    Carimo, Rossana
    Blekinge Tekniska Högskola, Sektionen för teknik, Avdelningen för programvarusystem.
    Evaluation of the UML profile for QoS from the user perspective2007Independent thesis Advanced level (degree of Master (One Year))Oppgave
    Abstract [en]

    Addressing Quality of Service and specification of quality attributes has been gaining a growing importance in the software engineering area. The research presented in this study investigates different approaches to specification of Quality of Service. UML profile for Quality of Service is one of the standards of the Quality of Service specification and is described in the QoS specification context. The research aim of this thesis is the evaluation of the UML profile for Quality of Service against the following criteria: expressiveness, reusability, understandability, applicability and tool support, as well as further comparison of the profile with other Quality of Service specification languages. To perform that, several tasks and activities were conducted, such as a survey on different QoS specification languages, an examination of the UML profile for Quality of Service, the formulation of the evaluation criteria, and the appliance of the criteria in the evaluation and comparison processes. This study is performed from the perspective of readers and users of the profile that are not UML experts but have sufficient knowledge of UML in terms of software systems analysis and design. The context of the UML profile and Quality of Service aspects include basic concepts of the UML 2.0 and Quality of Service which will be described along the thesis. The main contribution of the thesis is the evaluation of the UML profile for Quality of Service against a set of criteria, followed by explanations on the contents of the profile and how Quality of Service is specified within it. The presented comparison of the UML profile and other Quality of Service specification languages could be the basis for a user to decide what language to use in a particular situation. This study can be comprehended as a starting point for further evaluation of the UML profile and its comparison with other quality specification languages.

  • 373.
    Carlson, Jan
    et al.
    Malardalen Univ, Vasteras, Sweden..
    Papatheocharous, Efi
    Swedish Inst Comp Sci, Stockholm, Sweden..
    Petersen, Kai
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    A Context Model for Architectural Decision Support2016Inngår i: PROCEEDINGS 2016 1ST INTERNATIONAL WORKSHOP ON DECISION MAKING IN SOFTWARE ARCHITECTURE, IEEE Computer Society, 2016, s. 9-15Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Developing efficient and effective decision making support includes identifying means to reduce repeated manual work and providing possibilities to take advantage of the experience gained in previous decision situations. For this to be possible, there is a need to explicitly model the context of a decision case, for example to determine how much the evidence from one decision case can be trusted in another, similar context. In earlier work, context has been recognized as important when transferring and understanding outcomes between cases. The contribution of this paper is threefold. First, we describe different ways of utilizing context in an envisioned decision support system. Thereby, we distinguish between internal and external context usage, possibilities of context representation, and context inheritance. Second, we present a systematically developed context model comprised of five types of context information, namely organization, product, stakeholder, development method & technology, and market & business. Third, we exemplary illustrate the relation of the context information to architectural decision making using existing literature.

  • 374.
    Carlsson, Anders
    Blekinge Tekniska Högskola, Institutionen för programvaruteknik och datavetenskap.
    A guideline for evaluating OODBMSs2003Independent thesis Advanced level (degree of Master (One Year))Oppgave
    Abstract [en]

    Object oriented databases have been around since the late 1980’s. Object oriented programming languages have been around since the sixties. Today the need for object oriented databases is growing along with the complexity of the software systems developed. There are today a number of object oriented databases available on the market. The apabilities and properties of the systems are covering a wide range, making the choice of system difficult to the developer. This thesis presents a guideline for evaluating object oriented database management systems to be able to compare different systems and chose which one to use.

  • 375.
    Carlsson, Anders
    Blekinge Tekniska Högskola, Institutionen för programvaruteknik och datavetenskap.
    Object oriented databases: a natural part of object oriented software development?2003Independent thesis Basic level (degree of Bachelor)Oppgave
    Abstract [en]

    The technology of object oriented databases was introduced to system developers in the late 1980?s. Despite that it is rarely used today. This thesis introduces the concept of object oriented databases as the purposed solution to the problems that exist with the use of relational databases. The thesis points to the advantages with storing the application objects in the database without disassembling them to fit a relational data model. Based on that advantages and the cost of introducing such a rarely used technology into a project, a guideline for when to use object oriented databases and when to use relational databases is given.

  • 376.
    Carlsson, Bengt
    et al.
    Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation.
    Ayalew, Tigist
    Kidane, Tigist
    Identification and evaluation of security activities in agile projects2013Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We compare four high-profile waterfall security-engineering processes (CLASP, Microsoft SDL, Cigital Touchpoints and Common Criteria) with the available preconditions within agile processes. Then, using a survey study, agile security activities are identified and evaluated by practitioners from large companies, e.g. software and telecommunication companies. Those activities are compared and a specific security engineering process is suggested for an agile process setting that can provide high benefit with low integration cost.

  • 377. Carlsson, Bengt
    et al.
    Davidsson, Paul
    Jacobsson, Andreas
    Johansson, Stefan J.
    Persson, Jan A.
    Security aspects on inter-organizational cooperation using wrapper agents2009Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The significance of electronic information exchange in inter-organizational cooperation is well-known. We will here focus on the particular requirements of SMEs. We describe a general wrapper agent solution based on open source freeware that makes it possible (in principle) for any business system to exchange information with any other business system. It has been successfully applied in a pilot study involving two companies in a transport chain using different business systems. We also suggest further improvements by addressing security issues as well as an extended, possibly dynamic, set of involved companies and higher levels of cooperation.

  • 378.
    Carlsson, Jimmy
    Blekinge Tekniska Högskola, Institutionen för programvaruteknik och datavetenskap.
    A practical approach toward architectures for open computational systems2002Independent thesis Basic level (degree of Bachelor)Oppgave
    Abstract [en]

    By means of a systemic approach toward analysis and design of complex systems, we introduce the issue of implementing open computational systems on service-oriented architectures. We start by studying general systems theory, as it accounts for analysis and modeling of complex systems, and then compare three different implementation strategies toward system implementation. As such, the comparison is grounded in the notion of supporting architectures and, more specifically, in the practical case of a service-oriented layered architecture for communicating entities (SOLACE).

  • 379.
    Carlsson, Mattias
    et al.
    Blekinge Tekniska Högskola, Institutionen för arbetsvetenskap och medieteknik.
    Egnell, Annika
    Blekinge Tekniska Högskola, Institutionen för arbetsvetenskap och medieteknik.
    Managerial, Technical and Co-learning: Different Practices in Process Support for Software Development2002Independent thesis Advanced level (degree of Master (One Year))Oppgave
    Abstract [en]

    This Master Thesis looks into software development processes and the work activities these need to support. Hesitation against process support within Software developing organisations combined with a possibility to develop process support for such a company, made the foundation for this thesis. The reference company where the study took place is a large worldwide Telecom company where we focused on one design department with 25 people. Instead of using Participatory Design (PD) [Schuler, Namioka] as a method for Software development as traditionally, we used it for developing process support together with the people at the department. Three different supports for different project processes were created with PD and an evolutionary way of work together with the ?designers?. We came to a complex project environment which required control in several aspects such as project sponsoring, project management, line management, design maintenance etc. We saw a way of working that was following a common agreed way of work by the group that is formed by socio-emotional aspects and co-learning aspects [Hägerfors, 1995]. In contrast to this, the study showed that the available process support and also the use of the process support had a clear concentration towards a management focus ? the control function. The available process support and the use of this did not really consider the aspects of Socio-emotional or Co-learning. Existing process support was built around documents that became evidence for actual activities during the project. The process support developed during this study (by us and the designers) finally also got that concentration. A conclusion is that when the organisation puts high requirements on control of projects, this will also affect the way the organisation wants support for work. This is the missing point.

  • 380.
    Castaño, Víctor
    Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation.
    A Framework for an Intelligent and Adaptive Planning of Rehabilitation Therapies2011Independent thesis Advanced level (degree of Master (Two Years))Oppgave
    Abstract [en]

    Context. In the forthcoming years Healthcare Systems will become better informed, more efficient and particularly focused on the patient through the integration of Information and Communication Technologies. Medical Rehabilitation is an example of a field prone for this evolution. Here, disciplines such as Software Engineering will play a key role during the transformation. Objectives. This study pursues to understand todays rehabilitation therapies and procedures, to conceive how future computer-aided rehabilitation systems should be constructed and to provide a coherent framework that conceptualizes the relationship of their main components and interactions. Methods. The overall thesis work involves a combination of different research methodologies, which vary from literature reviews, empirical observations and semi-structured ethnographic interviews, to constructive research, through software architectural designs. Results. FIAP-RT is a framework created to support the new paradigm on how future software tools oriented to Medical Rehabilitation should be constructed with views to achieve quality attributes such as interoperability, availability, security, accessibility, usability or reliability. Conclusions. This study reveals that it is generally hard to find a real socialization and dissemination of the know-how that is being constantly produced within rehabilitation centers. In addition, it is has been shown how applied Software Engineering can help to integrate advanced solutions even though further evaluation would be needed to validate the proposed framework.

  • 381.
    Cederström, Andreas
    Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation.
    On using Desktop Grid Computing in software industry2010Independent thesis Advanced level (degree of Master (One Year))Oppgave
    Abstract [en]

    Context. When dealing with large data sets and heavy calculations the common solution is clusters, supercomputers or Grids of these two. However, there are ways of gaining large computational power by utilizing the unused cycles of regular home or office computers, this are referred to as Desktop Grids. Objectives. In this study we review the current field of solutions for open source Desktop Grid computing capable of dealing with a heterogeneous set of clients and dynamic size of the Desktop Grid. We investigate current use, interest of use and priority of key attributes of Desktop Grids. Finally we want to show how time effective Desktop Grids are compared to execution on a single machine and in the process show effort needed to setup a Desktop Grid and start computing. The overall purpose of this study is to provide a path for industry organizations to take when taking the first step into Desktop Grid computing. Methods. We use a systematic review to collect information of existing open source Desktop Grid solutions. Studies are selected based on inclusion criterions and a quality assessment. A survey questioner is used to assess industry usage, interest and prioritization of attributes of Desktop Grids. We will conduct an experiment to show execution speedup as well as setup effort. Results. We found ten open source Desktop Grids fulfilling our requirements. The survey shows that Desktop Grids is used to a very little extent within industry while a majority of the participants state that there is an interest for Desktop Grids. As result of the experiment, we can say that we achieved very high speedup and that effort needed to setup a Desktop Grid is about 40 hours for one person with no prior experience to the selected Desktop Grid system. Conclusions. We conclude that industry organizations have a possible need for Desktop Grids but in order to be more successful, Desktop Grid developers must put more effort into areas as automated testing and code compilation.

  • 382.
    Chamala, Navneet Reddy
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Reasons Governing the Adoption and Denial of TickITplus: A Survey2015Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Context. Software Process Improvement (SPI) initiatives like Capability Maturity Model (CMM), Capability Maturity Model Integration (CMMI), Bootstrap etc., have been developed on the primary agenda of continuous software process improvement. Similarly, about two decades ago, the United Kingdom Accreditation Services (UKAS) have laid down a set of guidelines based on the ISO quality standards for providing certification to organizations named TickIT. TickIT is now obsolete with its successor scheme TickITplus taking up its place with a lot of significant additions. All the companies which were certified based on TickIT guidelines (more than 1000 companies) were asked to move to TickITplus in order to keep their TickIT certification. However, until now it has been three years since the inception of TickITplus and only 70 companies have adopted TickITplus. This is way below relative to the number of TickIT certified organizations. The present thesis is done in order to find the factors why most of the companies have not adopted TickITplus and also why the 70 organizations have moved to TickITplus.  

    Objectives In this study, an attempt has been made to accomplish the following objectives: Identifying the changes that have been brought about in the new scheme. The factors that a software organization looks into while adopting or migrating to a new software quality certification scheme are identified. Validate these factors with the help of survey and interviews. Analyze the results of survey and interviews to provide the reasons why most of the organizations haven’t adopted TickITplus certification scheme.

    Methods. This research is done by using a mixed method approach by incorporating both quantitative and qualitative research methods. An online survey is conducted with the help of an online questionnaire as part of the quantitative leg. Two survey questionnaires have been framed to gather responses. With respect to the qualitative research method interviews are conducted to get a wider understanding about the factors that led an organization to migrate or not to migrate to TickITplus. The gathered data is analyzed using statistical methods like bivariate and univariate analysis for the quantitative method and thematic coding has been applied for the qualitative method. Triangulation method is used to validate the data obtained by correlating the results from the survey and interviews with those extracted from the literature review.

    Results. Results pertaining to the reasons why companies have moved to and also why other companies haven’t taken up TickITplus have been gathered from the survey and interviews. It was identified that high costs and low customer demand were the main reasons for the organizations not to choose TickITplus while among the organizations which have moved to TickITplus have also chosen the scheme based on customer requirement. However, few other reasons apart from these have also been identified which are presented in this document

    Conclusions. Conclusions have been drawn citing the importance of costs incurred for implementing TickITplus as a reason for not selecting TickITplus as it was considered very expensive. Among other reasons customer requirement was also low which was identified as a factor for the relatively low number of TickITplus certified organizations. On the other hand, among the TickITplus certified firms, customer demand forms the prominent reason for moving to TickITplus and lack of appropriate people to take up the work was considered as an important hindrance while implementing TickITplus. Several other reasons and challenges have also been identified which are clearly detailed in the document.

  • 383.
    Charla, Shiva Bhavani Reddy
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Examining Various Input Patterns Effecting Software  Application Performance: A Quasi-experiment on Performance Testing2016Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Nowadays, non-functional testing has a great impact on the real-time environment. Non-functional testing helps to analyze the performance of the application on both server and client. Load testing attempts to cause the system under test to respond incorrectly in a situation that differs from its normal operation, but rarely encountered in real world use. Examples include providing abnormal inputs to the software or placing real-time software under unexpectedly high loads. High loads are induced over the application to test the performance, but there is a possibility that particular pattern of the low load could also induce load on a real-time system. For example, repeatedly making a request to the system every 11 seconds might cause a fault if the system transitions to standby state after 10 seconds of inactivity. The primary aim of this study is to find out various low load input patterns affecting the software, rather than simply high load inputs. A quasi-experiment was chosen as a research method for this study. Performance testing was performed on the web application with the help of a tool called HP load runner. A comparison was made between low load and high load patterns to analyze the performance of the application and to identify bottlenecks under different load.

  • 384.
    Chatzipetrou, Panagiota
    et al.
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Alégroth, Emil
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Papatheocharous, Efi
    RISE SICS AB, SWE.
    Borg, Markus
    RISE SICS AB, SWE.
    Gorschek, Tony
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Wnuk, Krzysztof
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Component selection in Software Engineering: Which attributes are the most important in the decision process?2018Inngår i: EUROMICRO Conference Proceedings, IEEE conference proceedings, 2018, s. 198-205Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Abstract— Component-based software engineering is a common approach to develop and evolve contemporary software systems where different component sourcing options are available: 1)Software developed internally (in-house), 2)Software developed outsourced, 3)Commercial of the shelf software, and 4) Open Source Software. However, there is little available research on what attributes of a component are the most important ones when selecting new components. The object of the present study is to investigate what matters the most to industry practitioners during component selection. We conducted a cross-domain anonymous survey with industry practitioners involved in component selection. First, the practitioners selected the most important attributes from a list. Next, they prioritized their selection using the Hundred-Dollar ($100) test. We analyzed the results using Compositional Data Analysis. The descriptive results showed that Cost was clearly considered the most important attribute during the component selection. Other important attributes for the practitioners were: Support of the component, Longevity prediction, and Level of off-the-shelf fit to product. Next an exploratory analysis was conducted based on the practitioners’ inherent characteristics. Nonparametric tests and biplots were used. It seems that smaller organizations and more immature products focus on different attributes than bigger organizations and mature products which focus more on Cost

  • 385.
    Chatzipetrou, Panagiota
    et al.
    Aristotle Univ Thessaloniki, Dept Informat, GR-54006 Thessaloniki, Greece..
    Angelis, Lefteris
    Aristotle Univ Thessaloniki, Dept Informat, GR-54006 Thessaloniki, Greece..
    Barney, Sebastian
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Wohlin, Claes
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    An experience-based framework for evaluating alignment of software quality goals2015Inngår i: Software quality journal, ISSN 0963-9314, E-ISSN 1573-1367, Vol. 23, nr 4, s. 567-594Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Efficient quality management of software projects requires knowledge of how various groups of stakeholders involved in software development prioritize the product and project goals. Agreements or disagreements among members of a team may originate from inherent groupings, depending on various professional or other characteristics. These agreements are not easily detected by conventional practices (discussions, meetings, etc.) since the natural language expressions are often obscuring, subjective, and prone to misunderstandings. It is therefore essential to have objective tools that can measure the alignment among the members of a team; especially critical for the software development is the degree of alignment with respect to the prioritization goals of the software product. The paper proposes an experience-based framework of statistical and graphical techniques for the systematic study of prioritization alignment, such as hierarchical cluster analysis, analysis of cluster composition, correlation analysis, and closest agreement-directed graph. This framework can provide a thorough and global picture of a team's prioritization perspective and can potentially aid managerial decisions regarding team composition and leadership. The framework is applied and illustrated in a study related to global software development where 65 individuals in different roles, geographic locations and professional relationships with a company, prioritize 24 goals from individual perception of the actual situation and for an ideal situation.

  • 386. Chatzipetrou, Panagiota
    et al.
    Angelis, Lefteris
    Barney, Sebastian
    Wohlin, Claes
    Software product quality in global software development: Finding groups with aligned goals2011Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The development of a software product in an organization involves various groups of stakeholders who may prioritize the qualities of the product differently. This paper presents an empirical study of 65 individuals in different roles and in different locations, including on shoring, outsourcing and off shoring, prioritizing 24 software quality aspects. Hierarchical cluster analysis is applied to the prioritization data, separately for the situation today and the ideal situation, and the composition of the clusters, regarding the distribution of the inherent groupings within each of them, is analyzed. The analysis results in observing that the roles are not that important in the clustering. However, compositions of clusters regarding the onshore-offshore relationships are significantly different, showing that the offshore participants have stronger tendency to cluster together. In conclusion, stakeholders seem to form clusters of aligned understanding of priorities according to personal and cultural views rather than their roles in software development.

  • 387. Chatzipetrou, Panagiota
    et al.
    Angelis, Lefteris
    Rovegård, Per
    Wohlin, Claes
    Prioritization of issues and requirements by cumulative voting: A compositional data analysis framework2010Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Cumulative Voting (CV), also known as Hundred-Point Method, is a simple and straightforward technique, used in various prioritization studies in software engineering. Multiple stakeholders (users, developers, consultants, marketing representatives or customers) are asked to prioritize issues concerning requirements, process improvements or change management in a ratio scale. The data obtained from such studies contain useful information regarding correlations of issues and trends of the respondents towards them. However, the multivariate and constrained nature of data requires particular statistical analysis. In this paper we propose a statistical framework; the multivariate Compositional Data Analysis (CoDA) for analyzing data obtained from CV prioritization studies. Certain methodologies for studying the correlation structure of variables are applied to a dataset concerning impact analysis issues prioritized by software professionals under different perspectives. These involve filling of zeros, transformation using the geometric mean, principle component analysis on the transformed variables and graphical representation by biplots and ternary plots.

  • 388.
    Chatzipetrou, Panagiota
    et al.
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Ouriques, Raquel
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Gonzalez-Huerta, Javier
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Approaching the Relative Estimation Concept with Planning Poker2018Inngår i: ACM International Conference Proceeding Series, Association for Computing Machinery , 2018, s. 21-25Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Simulation is a powerful instrument in the education process that can help students experience a reality context and understand complex concepts required to accomplish practitioners' tasks. The present study aims to investigate the software engineering students' perception about the usefulness of the Planning Poker technique in relation to their understanding of the relative estimation concept. We conducted a simulation exercise where students first estimated tasks applying the concepts of relative estimation based on the concepts explained in the lecture, and then to estimate tasks applying the Agile Planning Poker technique. To investigate the students' perception, we used a survey at the end of each exercise. The preliminary results did not show statistical significance on the students' confidence to estimate relatively the user stories. However, from the students' comments and feedback, there are indications that students are more confident in using Agile Planning Poker when they are asked to estimate user stories. The study will be replicated in the near future to a different group of students with a different background, to have a better understanding and also identify possible flaws of the exercise. © 2018 Association for Computing Machinery.

  • 389.
    Chatzipetrou, Panagiota
    et al.
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Unterkalmsteiner, Michael
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Gorschek, Tony
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Requirements' Characteristics: How do they Impact on Project Budget in a Systems Engineering Context?2019Inngår i: Proceedings - 45th Euromicro Conference on Software Engineering and Advanced Applications, SEAA 2019, Institute of Electrical and Electronics Engineers Inc. , 2019, s. 260-267Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Background: Requirements engineering is of a principal importance when starting a new project. However, the number of the requirements involved in a single project can reach up to thousands. Controlling and assuring the quality of natural language requirements (NLRs), in these quantities, is challenging. Aims: In a field study, we investigated with the Swedish Transportation Agency (STA) to what extent the characteristics of requirements had an influence on change requests and budget changes in the project. Method: We choose the following models to characterize system requirements formulated in natural language: Concern-based Model of Requirements (CMR), Requirements Abstractions Model (RAM) and Software-Hardware model (SHM). The classification of the NLRs was conducted by the three authors. The robust statistical measure Fleiss' Kappa was used to verify the reliability of the results. We used descriptive statistics, contingency tables, results from the Chi-Square test of association along with post hoc tests. Finally, a multivariate statistical technique, Correspondence analysis was used in order to provide a means of displaying a set of requirements in two-dimensional graphical form. Results: The results showed that software requirements are associated with less budget cost than hardware requirements. Moreover, software requirements tend to stay open for a longer period indicating that they are 'harder' to handle. Finally, the more discussion or interaction on a change request can lower the actual estimated change request cost. Conclusions: The results lead us to a need to further investigate the reasons why the software requirements are treated differently from the hardware requirements, interview the project managers, understand better the way those requirements are formulated and propose effective ways of Software management. © 2019 IEEE.

  • 390.
    Chatzipetrou, Panagiota
    et al.
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Šmite, Darja
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Van Solingen, Rini
    Delft University of Technology, NLD.
    When and who leaves matters: Emerging results from an empirical study of employee turnover2018Inngår i: PROCEEDINGS OF THE 12TH ACM/IEEE INTERNATIONAL SYMPOSIUM ON EMPIRICAL SOFTWARE ENGINEERING AND MEASUREMENT (ESEM 2018), Association for Computing Machinery (ACM), 2018, artikkel-id a53Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Background: Employee turnover in GSD is an extremely important issue, especially in Western companies offshoring to emerging nations. Aims: In this case study we investigated an offshore vendor company and in particular whether the employees' retention is related with their experience. Moreover, we studied whether we can identify a threshold associated with the employees' tendency to leave the particular company. Method: We used a case study, applied and presented descriptive statistics, contingency tables, results from Chi-Square test of association and post hoc tests. Results: The emerging results showed that employee retention and company experience are associated. In particular, almost 90% of the employees are leaving the company within the first year, where the percentage within the second year is 50-50%. Thus, there is an indication that the 2 years' time is the retention threshold for the investigated offshore vendor company. Conclusions: The results are preliminary and lead us to the need for building a prediction model which should include more inherent characteristics of the projects to aid the companies avoiding massive turnover waves. © 2018 ACM.

  • 391.
    Chen, Hao
    et al.
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Xu, Luyang
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Software Architecture and Framework for Programmable Automation Controller: A Systematic Literature Review and A Case Study2018Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Background. PAC controller is a strengthened version of PLC controller. Its function is very similar, but its essence and construction are different. PLC and PAC have many successful applications in the field of industrial automation control. There is a lot of literature about the software architecture of PLC control system. However, there is almost no relevant literature on software architecture based on PAC control system. A well-performing and stable automatic control system is indispensable to the design and development of suitable software architecture. The quality and pattern of software architecture can even affect the stability and efficiency of the control system.

    Objectives. Based on these problems, we defined two primary objectives. The first is to investigate the architecture of some existing large industrial control systems, to analyze and summarize the scenarios and advantages and disadvantages of these architectural patterns. The second, based on the results of effort for the first objective, we want to propose and design a set of automated control solution architecture model based on PAC control system, which is implemented and applied in a printing house. In the process, we sum up the challenges and obstacles encountered in implementing the solution and provide some guidance or reference for those involved in the field.

    Methods. For the first objective, we used a systematic literature review to collect data about existing ICS architecture. Concerning the second objective, a case study was conducted in a printing house in Karlskrona Sweden, in the study, we proposed a software architecture model suitable for PAC automation control system. Then, we developed and tested the automation control system and summarized some challenges and obstacles in the process of the implementation.

    Results. The existing ICS (Industrial Control System) architecture models and critical problems and challenges in the implementation of ICS are identified. From the existing literature, we have summarized five commonly used large industrial control system architecture models, which are mainly using composite structures, that is, a combination of multiple architecture patterns. Also, some critical problems in the industrial control system, such as information security, production reliability, etc. are also identified. In the case study, we put forward an automatic control solution for Printing House based on SLR results. We designed the hardware deployment architecture of the system and the software control architecture. Generally speaking, this architecture is based on C/S architecture. In the development of client, we adopt the popular MVC architecture mode. In the longitudinal view of the whole system, an extended hierarchical architecture model is adopted. In the core control system, we adopt the modular architecture design idea. The whole control system is composed of 6 parts, four subsystems of PAC terminal, one server-side program and one client program. After a long time, development and test, our system finally goes online for the production, and its production efficiency is improved compared with the old system. Its expansion functions, such as Production Report and Tag Print, are deeply satisfying for the customers.

    Conclusions. In this research, we summarize and compare the advantages and disadvantages of several commonly used industrial control systems. Besides, we proposed a software architecture model and developed an automation control system based on PAC. We fill the gap that there is a lack of studies about the software architecture about the implementation of the automation control system based on PAC. Our result can help software engineers and developers in ICS fields to develop their own PAC based automation control system.

  • 392.
    Chen, Mingda
    et al.
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    He, Yao
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Exploration on Automated Software Requirement Document Readability Approaches2017Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Context. The requirements analysis phase, as the very beginning of software development process, has been identified as a quite important phase in the software development lifecycle. Software Requirement Specification (SRS) is the output of requirements analysis phase, whose quality factors play an important role in the evaluation work. Readability is a quite important SRS quality factor, but there are few available automated approaches for readability measurement, because of the tight dependency on readers' perceptions. Low readability of SRS documents has a serious impact on the whole process of software development. Therefore, it's extremely urgent to propose effective automated approaches for SRS documents readability measurement. Using traditional readability indexes to analyze readability of SRS documents automatically is a potentially feasible approach. However, the effectiveness of this approach is not systematically evaluated before.

    Objectives. In this study, firstly, we aim to understand the readability of texts and investigate approaches to score texts readability manually. Then investigate existing automated readability approaches for texts with their working theories. Next, evaluate the effectiveness of measuring the readability of SRS documents by using these automated readability approaches. Finally, rank these automated approaches by their effectiveness.

    Methods. In order to find out the way how human score the readability of texts manually and investigate existing automated readability approaches for texts, systematic literature review is chosen as the research methodology. Experiment is chosen to explore the effectiveness of automated readability approaches.

    Results. We find 67 articles after performing systematic literature review. According to systematic literature review, human judging the readability of texts through reading is the most common way of scoring texts readability manually. Additionally, we find four available automated readability assessments tools and seven available automated readability assessments formulas. After executing the experiment, we find the actual value of effectiveness of all selected approaches are not high and Coh-Metrix presents the highest actual value of effectiveness of automated readability approach among the selected approaches.

    Conclusions. Coh-Metrix is the most effective automated readability approach, but the feasibility in directly applying Coh-Metrix in SRS documents readability assessments cannot be permitted. Since the actual value of evaluated effectiveness is not high enough. In addition, all selected approaches are based on metrics of readability measures, but no semantic factors are blended in readability assessments. Hence studying more on human perception quantifying and adding semantic analysis in SRS documents readability assessment could be two research directions in future.

  • 393.
    Cheng, Chow Kian
    et al.
    Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation.
    Permadi, Rahadian Bayu
    Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation.
    Towards an Evaluation Framework for Software Process Improvement2009Independent thesis Advanced level (degree of Master (Two Years))Oppgave
    Abstract [en]

    Software has gained an essential role in our daily life in the last decades. This condition demands high quality software. To produce high quality software many practitioners and researchers put more attention on the software development process. Large investments are poured to improve the software development process. Software Process Improvement (SPI) is a research area which is aimed to address the assessment and improvement issues in the software development process. One of the most important aspects in software process improvement is to measure the results gained from the embarked process change. Without measuring the results, it is hard to tell whether the goals have been achieved or not. However, measurement for software process improvement is not a trivial task. Furthermore, there is no common systematic methodology that can be used to help measuring the performance of software process improvement initiatives. This thesis is intended to provide basic key concepts for the effective measurement and evaluation of the outcome of software process improvement. A major part of this thesis presents the systematic review in evaluating the outcome of software process improvement. The systematic review is aimed at the identification of the major issues in software process improvement evaluation and to gather the requirements for a software process improvement measurement and evaluation framework. Based on the results of the systematic review, a measurement and evaluation model is formulated. The objective of the model is to provide the groundwork for a software process improvement measurement and evaluation framework. The model is deemed to be applicable in a broad spectrum of scenarios by providing concepts that are independent from specific SPI initiatives.

  • 394.
    Chennamsetty, Harish
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Experimentation in Global Software Engineering2015Independent thesis Advanced level (degree of Master (Two Years))Oppgave
    Abstract [en]

    Context: Software engineering researchers are guided by research principles to conduct any type of research. Though, there are many guidelines to detail how a particular research method can be applied, there is always a necessity to continue and to improve the existing empirical research strategies. The context of this thesis is to address guidelines for conducting controlled experiments in Global Software Engineering (GSE). With this thesis, the state-of-the-art of conducting experiments in GSE research has been explored. Objectives: The goal of this thesis is to analyze the existing experiments in GSE research. Research problems addressed with GSE experiments and the state-of-the-art of overall GSE experiment design need to be analyzed. Appropriate guidelines should be drawn in order to provide strategies to future GSE researchers in mitigating or solving GSE specific experimentation challenges. Methods: A systematic literature review (SLR) is conducted to review all the GSE experiments that are found in the literature. The search process was done on 6 databases. A specific search and quality assessment criterion is used to select these GSE experiments. Furthermore, scientific interviews are conducted with GSE research experts to evaluate a set of guidelines (thesis author’s recommendations) that address the challenges when conducting GSE experiments. Thematic analysis has been performed to analyze the evaluation results and to further improve or implement any suggestions given by the interviewees. Conclusions: The results obtained from the SLR have provided a chance to understand the state-of-the-art and to analyze the challenges or problems when conducting controlled experiments in GSE. The challenges that are identified in GSE controlled experiments are found to be with experiment study-setting, involving subjects and addressing GSE relevant threats to validity in a GSE experiments. 9 guidelines are framed, with each guideline addressing a specific challenge. The final guidelines (that resulted after interviews) provide effective recommendations to GSE researchers when conducting controlled experiments.

  • 395.
    Cherif, Redha
    Blekinge Tekniska Högskola, Sektionen för teknik, Avdelningen för programvarusystem.
    Software Process Simulation Modelling: A Multi Agent-Based Simulation Approach2008Independent thesis Advanced level (degree of Master (One Year))Oppgave
    Abstract [en]

    In this research we present one of the first actual applications of Multi Agent-Based Simulation (MABS) to the field of software process simulation modelling (SPSM). Although a few previous applications were attempted, we explain in our literature review how these failed to take full advantage of the agency paradigm. Our research resulted in a model of the software development process that integrates performance, cognition and artefact quality, for which we built a common simulation framework to implement and run MABS and System Dynamics (SD) simulators upon the same integrated models. Although it is not possible to fully verify and validate implementations and models like ours, we used a number of verification and validation techniques to increase our confidence in these. Our work is also quite unique in that it compares MABS to SD in the context of SPSM. Here, we uncovered quite interesting properties of each simulation approach and how MABS, for example, is "risk averse" when compared to SD. In our discussion section we also present a number of lessons learned regarding the two simulation paradigms as well as various shortcomings in the models we adopted and our own.

  • 396. Cherif, Redha
    et al.
    Davidsson, Paul
    Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation.
    Software Development Process Simulation: Multi Agent-Based Simulation versus System Dynamics2009Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We present one of the first actual applications of Multi Agent-Based Simulation (MABS) to the field of software process simulation modelling (SPSM). Although there are some recent attempts to do this, we argue that these fail to take full advantage of the agency paradigm. Our model of the software development process integrates individual-level performance, cognition and artefact quality models in a common simulation framework. In addition, this framework allows the implementation of both MABS and System Dynamics (SD) simulators using the same basic models. As SD is the dominating approach within SPSM, we are able to make relevant and unique comparisons between it and MABS. This enabled us to uncover quite interesting properties of these approaches, e.g., that MABS re-flects the problem domain more realistically than SD.

  • 397. Cherif, Redha
    et al.
    Davidsson, Paul
    Software Development Process Simulation: Multi Agent-Based Simulation versus System Dynamics2010Inngår i: Multi Agent Based Simulation X, Lecture Notes in Computer Science, Springer , 2010Kapittel i bok, del av antologi (Fagfellevurdert)
    Abstract [en]

    We present one of the first actual applications of Multi Agent-Based Simulation (MABS) to the field of software process simulation modelling (SPSM). Although there are some recent attempts to do this, we argue that these fail to take full advantage of the agency paradigm. Our model of the software development process integrates individual-level performance, cognition and ar- tefact quality models in a common simulation framework. In addition, this framework allows the implementation of both MABS and System Dynamics (SD) simulators using the same basic models. As SD is the dominating ap- proach within SPSM, we are able to make relevant and unique comparisons be- tween it and MABS. This enabled us to uncover quite interesting properties of these approaches, e.g., that MABS reflects the problem domain more realisti- cally than SD.

  • 398.
    Chervyakov, Anatoly
    Blekinge Tekniska Högskola, Institutionen för programvaruteknik och datavetenskap.
    Simulation-based evaluation of berth allocation policies of container terminals2003Independent thesis Advanced level (degree of Master (One Year))Oppgave
    Abstract [en]

    The aim of this investigation is to test and verify a hypothesis concerning policies for berth allocation to ships in a container terminal. The chosen domain is a rich research area where simulation could be used. Because of the high amount of variables involved and demand for optimal usage of available resources management of a container terminal is a great challenge.

  • 399.
    chikkala, sai sandeep
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    EVALUATION CRITERIA FOR SELECTION OF API PRODUCTS: Practitioners' Perspective2017Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Context. The approach of developing software systems with the use of third partycomponents i.e. COTS or OSS has increased globally. In this study API product refers toeither a software component or a software service or both packaged together, that can beaccessed through an API. Developers are faced with plethora of alternative choices to selectan API product. With this increase in components adoption, API product providers are facedwith challenge of designing their product to be more attractive than others. This needs theproviders to be educated about the developer behavior when they choose an API product.Understanding the selection practices of developers can help providers to improve thepackaging of API products, making them more suitable for selection.

    Objectives. The objectives of this study is to investigate the criteria that developers usewhen reasoning about acceptability of a software component.

    Methods. A background study is performed to identify the evaluation criteria proposed inthe literature. An empirical study using Qualitative content analysis is performed. In the study the 480 reviews of different API products are analyzed to understand the criteria frompractitioners’ perspective.

    Results. 9 relevant criteria that developer use to reason about accepting or rejecting an APIProduct are identified. 30 sub criteria related to the 9 criteria are described in the study.

    Conclusions. This study concludes that the identified 9 criteria play an important role indeveloper assessment of the API product. It is also found that the criteria have significantimpact on the ratings of API product. These criteria could guide API product providers tomake better choices when developing the product.

  • 400.
    Chiwenda, Madock
    Blekinge Tekniska Högskola, Sektionen för teknik, Avdelningen för programvarusystem.
    Requirements Engineering Skills Development: A Survey2004Independent thesis Advanced level (degree of Master (One Year))Oppgave
    Abstract [en]

    Software projects are among the failure prone projects in engineering and software requirements problems have been attributed to be one of main reasons to software project failures. There are many techniques and methodology developed for practitioners to use in working with software requirements, which makes it impossible for one to master them during formal education. In addition, many of the practitioners are coming from different disciplines. Thus they are required to learn in practice. Previous studies have shown informal learning (i.e. not planned or run by institutions or organizations) to be more effective and more used in workplace learning situations. The study investigates how the requirements engineering skills are and can be learned in workplace especially informally. By comparing the results obtained by the literature study and empirical study the recommendations are given on how one can recognise, utilise, and encourage the informal learning activities to develop requirements engineering skills. The study does not rule out the need to have the formal education and training in requirements engineering but identify it as an important prerequisite and/or complement. It provides insight on how informal learning practices are utilised by practitioners who are rather experienced in requirements engineering and how they could try to recognise and/or utilise other learning opportunities presented by previous literature. It furthermore offers general recommendations of how to utilise the informal learning for developing requirements engineering skills and other related disciplines.

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