In fuzzy MCDM by [7], performance ratings and weights are usually represented by fuzzy numbers. An alternative is calculated by aggregating all criteria weights and alternatives ratings, where alternatives with a higher utility are preferred. Since software quality is basically determined by subjective perceptions and feelings towards each of the evaluated criterion, the Fuzzy Multiple Criteria Decision Making (FMCDM) approach can be more suitable to explain how customers make decisions to select the best software for organizations [5]. Among it, is the Technique for Order Performance by Similarity to Ideal Solution (TOPSIS) is a practical and useful technique for ranking and selection of a number of possible alternatives through measuring Euclidean distances. It bases upon the concept that the chosen
alternative should have the shortest distance from the Positive Ideal Solution (PIS), i.e., the solution that maximizes the benefit criteria and minimizes the cost criteria; and the farthest from the Negative Ideal Solution (NIS), i.e., the solution that maximizes the cost criteria and minimizes the benefit criteria [5],[6].