A New Aggregating Phase for Interval Type-2 Fuzzy TOPSIS Using the ELECTRE Ⅰ Method

摘要

Aggregating phase is considered as one of the important steps in interval type-2 fuzzy TOPSIS (IT2 FT) instead of ratings of alternatives under criteria and the importance weights of criteria and ranking of alternatives. However, some problems occur in aggregating phase of IT2 FT when it is have a large computational procedure due to the hardly defined in the second membership function. Therefore, we offer a more easier and practical in defining the new aggregating phase. Our proposed method is to establish a new aggregating phase for IT2 FT using the ELECTRE I method in the interval type-2 fuzzy set (IT2FS) concept. A numerical example is constructed to show the practicality and effectiveness of the proposed method.