This thesis seeks to find out the impact of Lean manufacturing (LM) on different sectors of process industries. 

The theory of this thesis was established mainly on published high-impact scholarly literature, such as books, journals, conferences and theses, as well as several online websites on the subject matters of LM. 

Afterwards, several hypotheses were formulated in order to check the findings of the present research regarding the impact om LM implementation on process industry.

The research method for testing these hypotheses used in the thesis is to investigate several published case studies on LM in different sectors of the process industry. The findings from the results of these case studies have been substantiated by a case study which was conducted via questionnaire- based interviews in one alcoholic beverage industry. 

The thesis reveals the importance of the inherent production process characteristics of each facility that sets out to implement lean as well as the range of expectations and benefits that can be witnessedupon successful employment of the most suitableLM practices. Additionally, attention is drawntowards the necessity of a continuous organization commitmentto the adoption of LM.

Future research prospects that stem from the present thesis consist of an analysis of many different lean practices and tools separately, their implementation as well as the impact they would effectuate on differentsectors of the process industry contrary to the combined analysis of the LM tools studied in this thesis. Moreover, while the scope in this thesis was the implementation and the outcome of LM, it would be of interest to investigate the factors that inhibit successful implementation on process industries.