complicated operational systematic, cannot be explained by the classical set theory which has strictly definite boundaries. So … distinctions from other numerical models. Fuzzy set theory was first proposed by Zadeh [1965] as a response to need for a method …, which can be successfully employed especially in working with concepts and qualitative variables. The fuzzy set theory …

with VIKOR, in the decision-making process to address uncertainties inherent, the theory of fuzzy systems were included in …

decision making methods of the Weighted Sum and Weighted Product models. This study introduces the theory of WASPAS, the …