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  • 1.
    Bakhtyar, Shoaib
    et al.
    Blekinge Institute of Technology, School of Computing.
    Holmgren, Johan
    Blekinge Institute of Technology, School of Computing.
    Persson, Jan
    Blekinge Institute of Technology, School of Computing.
    A synergy based method for designing ITS services2013In: international Journal of Advanced Logistics, ISSN 2287-7592, Vol. 2, no 2, p. 45-54Article in journal (Refereed)
    Abstract [en]

    In this paper, we propose a method for supporting the process of designing Intelligent Transportation System (ITS) services, which utilizes on primarily functional synergies with already existing services. Using synergies between services will enable sharing of resources, such as, information entities, functions and technical resources, which in turn may lead to reduced costs for implementing services. The method is built around an existing service description framework, which is used to describe both existing services and the service to be designed. In order to illustrate the usage of the suggested method, we have applied it for designing a new ITS service, i.e., the Liability Intelligent Transport System (LITS) service. The purpose of the LITS service is to support the process of identifying when, where and why freight has been damaged, and which actor was responsible when the freight was damaged. The LITS service may lead to better quality control of consignments and may also facilitate the identification of which actor was responsible for the freight damage, which is of particular interest in multi-modal transport. By applying our service design method we were able to identify that three out of four functions of the LITS service already exist in other existing ITS services. Therefore, the LITS service can be designed based on synergies with these services.

  • 2.
    Bakhtyar, Shoaib
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science and Engineering.
    Holmgren, Johan
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science and Engineering.
    Persson, Jan A.
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science and Engineering.
    Technical Requirements of the e-Waybill Service2016In: International Journal of Computer and Communication Engineering, ISSN 2010-3743, ISSN 2010-3743, Vol. 5, no 2, p. 130-140Article in journal (Refereed)
    Abstract [en]

    An electronic waybill (e-Waybill) is a service whose purpose is to replace the paper waybill, which is a paper documents that traditionally follows a consignment during transport. An important purpose of the e-Waybill is to achieve a paperless flow of information during freight transport. In this paper, we investigate five e-Waybill solutions, that is, system design specifications for the e-Waybill, regarding their non-functional (technical) requirements. In addition, we discuss how well existing technologies are able to fulfil the identified requirements. We have identified that information storage, synchronization and conflict management, access control, and communication are important categories of technical requirements of the e-Waybill service. We argue that the identified technical requirements can be used to support the process of designing and implementing the e-Waybill service.

  • 3.
    Davidsson, Paul
    et al.
    Blekinge Institute of Technology, School of Computing.
    Gustafsson Friberger, Marie
    Lavesson, Niklas
    Blekinge Institute of Technology, School of Computing.
    Persson, Jan
    Blekinge Institute of Technology, School of Computing.
    Towards a Prediction Model for People Movements in Urban Areas2013Conference paper (Refereed)
    Abstract [en]

    The aim of this work is to develop a new type of service for predicting and communicating urban activity. This service provides short-term predictions (hours to days), which can be used as a basis for different types of resource allocation and planning, e.g. concerning public transport, personnel, or marketing. The core of the service consists of a forecasting engine that based on a prediction model processes data on different levels of detail and from various providers. This paper explores the requirements and features of the forecast engine. We conclude that agent-based modeling seems as the most promising approach to meet these requirements. Finally, some examples of potential applications are described along with analyses of scientific and engineering issues that need to be addressed.

  • 4.
    Henesey, Lawrence
    et al.
    Blekinge Institute of Technology, School of Computing.
    Davidsson, Paul
    Blekinge Institute of Technology, School of Computing.
    Persson, Jan A.
    Blekinge Institute of Technology, School of Computing.
    Using Simulation in Evaluating Berth Allocation at a Container Terminal2004Conference paper (Refereed)
    Abstract [en]

    The operations and decision making at a container terminal have been simulated. A Berth Allocation Management System – (BAMS) has been built which consists of two parts: a container terminal simulator modelling the operations and a management simulator modelling the various actors involved in the allocation of container ships to berths. Together these two parts generate berth schedules for arriving container ships. Two berth assignment policies are evaluated in different scenarios, with various quay lengths, berth spacing lengths, and ship arrival sequences. The decisions in assigning ships with different loading and discharging demands to a limited amount of resources, such as berth space and cranes are analysed with the BAMS. The berths at the container terminal are modelled by the BAMS to be dynamic in the sense that berth segmentation is based on the current situation rather than being static. The policies are evaluated in terms of turn-around time and distance travelled by the straddle carriers. The simulation results indicate that an informed choice of berth assignment policy can provide better use of the available resources, e.g., by reducing turnaround time and/or distance travelled by the straddle carriers.

  • 5.
    Holmgren, Johan
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Systems and Software Engineering.
    Persson, Jan A.
    Blekinge Institute of Technology, School of Engineering, Department of Systems and Software Engineering.
    Davidsson, Paul
    Blekinge Institute of Technology, School of Engineering, Department of Systems and Software Engineering.
    Agent Based Decomposition of Optimization Problems2008Conference paper (Refereed)
    Abstract [en]

    In this paper, we present an agent-based approach for solving an optimization problem using a Dantzig-Wolfe column generation scheme, i.e., a decomposition approach. It has been implemented and tested on an integrated production, inventory, and distribution routing problem. We developed a decomposition model for this optimization problem, which was implemented in the Java programming language, using the Java Agent DEvelopment Framework (JADE) and the ILOG CPLEX mixed integer linear problem solver. The model was validated on a realistic scenario and based on the results, we present estimates of the potential performance gain by using a completely distributed implementation. We also analyze the overhead, in terms of communication costs, imposed by an agent based approach. Further we discuss the advantages and the disadvantages that comes with an agent-based decomposition approach.

  • 6.
    Holmgren, Johan
    et al.
    Blekinge Institute of Technology, School of Computing.
    Persson, Jan A.
    Blekinge Institute of Technology, School of Computing.
    Davidsson, Paul
    Blekinge Institute of Technology, School of Computing.
    Improving Multi-actor Production, Inventory and Transportation Planning through Agent-Based Optimization2013In: Agent and Multi-Agent Systems in Distributed Systems: Digital Economy and E-Commerce, Studies in Computational Intelligence / [ed] Hakansson, Anne; Hartung, Ronald, Berlin Heidelberg: Springer-Verlag , 2013, p. 1-31Chapter in book (Refereed)
    Abstract [en]

    We present an agent-based optimization approach that is built upon the principles of Dantzig-Wolfe column generation, which is a classic reformulation technique. We show how the approach can be used to optimize production, inventory, and transportation, which may result in improved planning for the involved supply chain actors. An important advantage is the possibility to keep information locally when possible, while still enabling global optimization of supply chain activities. In particular, the approach can be used as strategic decision support to show how the involved actors may benefit from applying Vendor Managed Inventory (VMI). In a case study, the approach has been applied to a real-world integrated production, inventory and routing problem, and the results from our experiments indicate that an increased number of VMI customers may give a significant reduction of the total cost in the system. Moreover, we analyze the communication overhead that is caused by using an agent-based, rather than a traditional (non agent-based) approach to decomposition, and some advantages and disadvantages are discussed.

  • 7.
    Mbiydzenyuy, Gideon
    et al.
    Blekinge Institute of Technology, School of Computing.
    Persson, Jan A.
    Blekinge Institute of Technology, School of Computing.
    Davidsson, Paul
    Blekinge Institute of Technology, School of Computing.
    Estimates of marginal cost savings for Intelligent Truck Parking Services in a combined deployment scenario2013Conference paper (Refereed)
    Abstract [en]

    Intelligent Truck Parking (ITP) involves efficient management of information as a tool for addressing some of the problems related to truck parking, such as, the inability to navigate to, or reserve a parking space. Different telematic services (ITP core services) may be required to address different stakeholder needs, e.g., a navigation service for finding the way to a truck parking area, and a reservation service for assuring the availability of a parking space when in the parking area. In addition to ITP core services, there are several other telematic services that address transport problems in general. If the synergies of different services are taken into account during design and deployment of telematic services, cost reduction may be achieved through functionality sharing. In this article, we have identified services that are relevant for sharing functionalities with ITP core services, estimate functionality costs and perform a synergy analysis to assess the marginal cost savings as a result. Overall results indicates that Traffic Information Broadcasting (TIB), Estimated Time of Arrival (ETA) for goods, and Geo-fencing (GEO) can form clusters with ITP core services that could lead to better cost savings compared to the rest of the services studied.

  • 8.
    Mbiydzenyuy, Gideon
    et al.
    Blekinge Institute of Technology, School of Computing.
    Persson, Jan A.
    Blekinge Institute of Technology, School of Computing.
    Davidsson, Paul
    Blekinge Institute of Technology, School of Computing.
    Clemedtson, Per Ola
    Method for quantitative valuation of road freight transport telematic services2012In: IET Intelligent Transport Systems, ISSN 1751-956X, E-ISSN 1751-9578, Vol. 6, no 4, p. 388-396Article in journal (Refereed)
    Abstract [en]

    This study describes transport telematic services (TTSs) for road-based heavy goods vehicle (HGV) transport and suggests a method for assessing the societal value of different TTSs. For decision making related to the selection of services to promote by potential investors, for example, governmental organisations and service providers, quantified service value can simplify the decision process by enabling comparison between TTSs. Moreover, these values can serve as inputs to quantitative analysis of service architectural system designs. The authors suggest a method for assessing the societal values of TTSs using potential saving indicators (PSIs), estimated in the context of Swedish HGV freight transport. To illustrate the proposed method, 32 services are analysed, and their societal values were quantified and compared for the Swedish HGV market. Results based on estimated values of PSIs and potential percentage savings indicate the following HGV-based TTSs to be of high societal potential: transport resource optimisation, dynamic traffic information, navigation, road hindrance warning, theft alarm and recovery, accident warning information, intelligent speed adaptation, eCall, en-route driver information, transport order handling, road user charging and sensitive goods monitoring.

  • 9.
    Mbiydzenyuy, Gideon
    et al.
    Blekinge Institute of Technology, School of Computing.
    Persson, Jan
    Blekinge Institute of Technology, School of Computing.
    Davidsson, Paul
    Blekinge Institute of Technology, School of Computing.
    Optimization analysis of multiservice architecture concepts in road transport telematics2012In: Journal of Intelligent Transportation Systems / Taylor & Francis, ISSN 1547-2450, E-ISSN 1547-2442, Vol. 16, no 4, p. 197-210Article in journal (Refereed)
    Abstract [en]

    Transport telematic systems, also known as intelligent transportation systems, can be expensive to implement but the services they provide may offer substantial benefits. However, what services the system can provide depends on the architectural choices made, which also affects the cost of the system. We propose an optimization model to support a more informed decision before investing in a multiple service transport telematic system. The model evaluates the possible choices of services and architectures, and aims to maximize the total net societal benefit. We argue that the optimization model can provide support for strategic decisions by highlighting the consequences of adopting different system architectures, including both societal value and cost. This can be useful for decision makers, such as governments, road transport telematic service providers, and commercial road freight transport operators.

  • 10.
    Mbiydzenyuy, Gideon
    et al.
    Blekinge Institute of Technology, School of Computing.
    Persson, Jan
    Blekinge Institute of Technology, School of Computing.
    Davidsson, Paul
    Blekinge Institute of Technology, School of Computing.
    Proposed Core Services for the Deployment of Intelligent Truck Parking2012Conference paper (Refereed)
    Abstract [en]

    This article suggest Transport Telematic Services (TTSs) to facilitate the realization of Intelligent Truck Parking (ITP) concept i.e. ITP core services e.g. a service that can support real time reservation of truck parking space using for instance mobile phone messaging capabilities. We consider ITP to include the collection, processing and delivery of information about Truck Parking Areas (TPAs) that may take place during the planning and execution of transportation services. A key feature for ITP core services is to achieve efficient information exchange related to TPA so as to improve the overall performance of the transport system. We suggest core services seen to have a potential for achieving ITP. Our suggestions are based on studying “what” kind of information exchanges among TPA stakeholders “when” and “where” the information is exchanged in relation to transport related challenges that are addressed with such information. Hence we suggest Truck Parking facility Utilization (TPU), Goods and Vehicle Safety assurance information (GVS), Parking Location Guidance (PLG) and Parking Reservation (PAR), as ITP core services.

  • 11.
    Persson, Jan A.
    et al.
    Blekinge Institute of Technology, School of Engineering.
    Göthe-Lundgren, Maud
    Shipment Planning at Oil Refineries Using Column Generation and Valid Inequalities2005In: European Journal of Operational Research, ISSN 0377-2217  , Vol. 163, no 3, p. 631-652  Article in journal (Refereed)
    Abstract [en]

    In this paper we suggest an optimization model and a solution method for a shipment planning problem. This problem concerns the simultaneous planning of how to route a fleet of ships and the planning of which products to transport in these ships. The ships are used for moving products from oil refineries to storage depots. There are inventory levels to consider both at the refineries and at the depots. The inventory levels are affected by the process scheduling at the refineries and demand at the depots. The problem is formulated using an optimization model including an aggregated representation of the process scheduling at the refineries. Hence, we integrate the shipment planning and the process scheduling at the refineries. We suggest a solution method based on column generation, valid inequalities, and constraint branching. The solution method is tested on data provided by the Nynas oil refinery company and solutions are obtained within 4 hours, for problem instances of up to 3 refineries, 15 depots, and 4 products when considering a time horizon of 42 days.  

  • 12.
    Woxenius, Johan
    et al.
    Blekinge Institute of Technology, School of Computing.
    Persson, Jan A.
    Blekinge Institute of Technology, School of Computing.
    Davidsson, Paul
    Blekinge Institute of Technology, School of Computing.
    Utilising more of the loading space in intermodal line trains-Measures and decision support2013In: Computers in industry (Print), ISSN 0166-3615, E-ISSN 1872-6194, Vol. 64, no 2, p. 146-154Article in journal (Refereed)
    Abstract [en]

    The focus of this article is to identify, characterise and qualitatively evaluate the existing measures for increasing the utilisation of loading space in intermodal road-rail freight line trains. Normally, these trains operate like intercity passenger trains, because they make short unit load transhipment stops along rail corridors in order to travel comparatively small and short flows. The measures for loading space utilisation include adapting the train's capacity, changing the departure times, altering the train routes and sending trucks to different terminals as well as replacing rail transport with trucks. Some of the measures require improved information sharing, and executives can strengthen the effect of the measures by adding decision support systems and price incentives to transport buyers.

1 - 12 of 12
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