Plenary Lecture

Fuzzy Based Decision Making for Green Concept Evaluation: A Comparative Study

Professor Zeki Ayağ
Faculty of Engineering and Natural Sciences
Department of Industrial Engineering
Kadir Has University

Abstract: Last two decades, the demand for green products have dramatically increased due to the fact that the public awareness of the preservation of natural environment was taken into consideration much more. As a natural result of this, especially manufacturing companies have been forced to develop more green products, resulting in a problem of how they incorporate environmental issues into their design and evaluate concept options. The need for the practical decision making tools to address this problem is rapidly evolving because the problem turns into a multiple-criteria decision making (MCDM) problem in the presence of a set of green concept alternatives and evaluation criteria. Therefore; in this paper, in current literature the popular MCDM methods in fuzzy environment are utilized to reflect the vagueness and uncertainty on the judgments of decision makers (DMs), because the crisp pairwise comparison in these conventional MCDM methods seems to be insufficient and imprecise to capture the right judgments of DMs. Furthermore, the incorporation of fuzzy set theory into these methods is discussed on a real-life case study, and a comparative analysis are done by using its numerical results. Moreover, more detailed analyses on the numerical results of the case study are completed on the normalization methods, distance metrics, aggregation functions, defuzzification methods, and other issues.

Brief Biography of the Speaker: Zeki Ayağ, Ph.D., P.Eng. as a Full Professor of Industrial Engineering is currently working as Director of the Graduate School of Science and Engineering at Kadir Has University. He holds an undergraduate degree in Industrial Engineering, a Master’s in Engineering Management, and a Ph.D. degree in Industrial Engineering from Istanbul Technical University. In addition to his academic experience, he has national and international industrial experience such as; CAD Engineer in Magna International, Inc. (Aurora, ON, Canada), Engineering Designer in Mold-Masters Ltd. (Georgetown, ON, Canada), Construction Department Chief in Makina Takim Endustrisi A.S., and Quality Assurance Engineer in Pimas A.S. He taught various courses on industrial engineering, such as; simulation, operations research, computer integrated manufacturing, multiple criteria decision making and so on. He has published many articles in the leading periodical journals mainly in the field of industrial engineering, indexed by SCI®) and SCI-Expanded®. He is also an active referee for the leading journals. He has also given many seminars on his interest fields with numerous publications in conference and congress proceedings. He is a licensed Professional Engineer (P.Eng.) from the Society of Professional Engineers in Ontario (PEO) in Canada. He is Senior Member of Institute of Industrial Engineers (IIE). He is also Associate Editor in Advances in Fuzzy Systems, Editorial Board Member of International Journal of Production Research, and in different capacities for other journals.

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