Development of a Supplier Selection Model Using Fuzzy and Grey COPRAS Methods

Nowadays, increasing competition conditions necessitate the restructuring of the relations of the enterprises with the supplier enterprise and customers on the supply chain. It is vital for businesses to determine the suppliers correctly. In this study, the criteria which are effective in the decision of supplier selection were determined and the importance levels were determined by using Fuzzy Analytic Hierarchy Process. As a result of the analysis, the most important criterion in the supplier selection process of the enterprise is the criterion of production capabilities of the supplier and the criteria with the least importance is the distribution criterion. Fuzzy and Grey COPRAS methods were used as two separate models in the evaluation of supplier alternatives. According to the results of the analysis, the findings obtained by both methods were found to be consistent. As a result, it has been seen that the Fuzzy AHP + COPRAS-F and Fuzzy AHP + COPRAS-G methods in supplier selection decision problem produce easy and fast results and can be applied successfully