In this paper, the evaluation of customers�satisfaction is investigated by using group decision making method under\nuncertainty. Here, we have used the Zadeh�s fuzzy concept to model and measure the satisfaction. For this purpose,\nwe have firstly applied the Delphi method with fuzzy Likert scales. Then, the fuzzy ELECTRE technique was used\nin order to ordering the index and questionnaires. For determining weights of the index we have applied the Zadeh�s\nextension principle. On order to show the applicability of the proposed fuzzy approach, we have provided a case study\nwhich was applied in Isfahan Gas Company.
Loading....