Modification of interval type-2 fuzzy topsis and its application to flood control project selection

Abstract

Multi-Attribute Decision Making (MADM) method is one of the widely used approaches to deal with decision making problems. One of the famous techniques in MADM is Interval Type-2 Fuzzy Technique for Order Preference by Similarity to Ideal Solution (IT2FTOPSIS). However, there are some circumstances in IT2FTOPSIS still needs to be improved. Therefore, the problems are divided into four phases including, Rating phase, Weighting phase, Aggregating phase and Ranking phase. In the Rating phase, there exists conflicts in evaluation process of linguistic variable.