Extension of Topsis For Group Decision-Making Based on the Type-2 Fuzzy Positive and Negative Ideal Solutions

In this paper based on the interval type-2 fuzzy sets, we introduce an extension of fuzzy topsis for handling fuzzy multiple attributes group decision making problems. in the proposed method the fuzzy positive ideal solution and fuzzy negative ideal solution are obtained in the form of interval type-2 fuzzy sets without ranking the elements of decision matrix, using the proposed method the solution of decision problem is obtained with less computational attempt than existing methods.