Green Supplier Selection Using Game Theory Based on Fuzzy SWARA

Abstract

Green supply chains are supply chains that prioritize nature in every activity and aim to minimize the damage to the environment. Finding suppliers that meet the desired criteria and meet the company's environmental objectives in establishing the green supply chain is a difficult process. The selection problem becomes more complicated when some criteria conflict with each other. It is also critical to consider the strategies that alternative suppliers can implement. Therefore, multi-criteria decision making methods and game theory approaches are suitable to overcome these difficulties. This study proposes a new integrated fuzzy SWARA, which is a multi-criteria decision making method using fuzzy numbers to express uncertainty, and game theory approach to compare green supplier alternatives. The proposed approach is carried out in a chemical company that produces cleaning products in Turkey. The manufacturer company wants to compare two alternative green suppliers. Green strategies of alternative suppliers are weighted via fuzzy SWARA method. Then, the game theory payoff matrix and the iterated elimination of strictly dominated strategies are applied to compare two alternative suppliers. The proposed methodology gets a compromise solution. These results are intended to contribute to green supplier evaluation practices.