Notice of Violation of IEEE Publication PrinciplesA Grey based method based on TOPSIS concepts for Multiple Criteria Decision Making problems

Supplier selection is a Multi-Criteria Decision-Making (MCDM) problem which includes both tangible and intangible factors. Since for the problem, most of the input information is not known precisely, supplier selection becomes more difficult. Grey theory is one of the methods used to study uncertainty, being superior in the mathematical analysis of systems with uncertain information. Here, we propose a simple grey based method based on the concepts of TOPSIS to evaluate and select the best supplier that the weights and ratings of attributes for all alternatives are described by linguistic variables that can be expressed in grey numbers. Through this article, we demonstrate that the approach can be applied to improve the group decision-making to solve the MCDM problem.