saujs Sakarya University Journal of Science 2147-835X Sakarya University 10.16984/saufenbilder.877919 Engineering Industrial Engineering Mühendislik Endüstri Mühendisliği Green Supplier Selection Using Game Theory Based on Fuzzy SWARA https://orcid.org/0000-0003-3333-7972 Taş Mehmet Ali TÜRK-ALMAN ÜNİVERSİTESİ https://orcid.org/0000-0003-4134-7679 Çakır Esra GALATASARAY ÜNİVERSİTESİ 08 30 2021 25 4 885 897 02 10 2021 06 08 2021 Copyright © 1997, Sakarya University Journal of Science 1997 Sakarya University Journal of Science

Green supplier selection involves a difficult and complex decision-making process because the criteria have a relationship with each other. Due to conflicts, the selection becomes crucial. Likewise, strategies among alternatives are critical to decide the best one. To overcome these difficulties, multi-criteria decision making methods and game theory approaches are appropriate. In this study, fuzzy SWARA, which is a multicriteria decision making method using fuzzy numbers to express uncertainty, and game theory are integrated to select the best alternative according to the vague opinion of decision makers. As a case study, an application is handled for a chemical company which produces cleaning products in Turkey. The selection occurs between two alternative green suppliers. The strategies of alternative suppliers are evaluated using the fuzzy SWARA method, then game theory aid to evaluate competition of the alternatives.

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