A NOVEL TRIANGULAR INTERVAL TYPE-2 INTUITIONISTIC FUZZY SETS an‎d THEIR AGGREGATION OPERATORS

The objective of this work is to present a triangular interval type- 2 (TIT2) intuitionistic fuzzy sets and their corresponding aggregation opera- tors, namely, TIT2 intuitionistic fuzzy weighted averaging, TIT2 intuitionistic fuzzy ordered weighted averaging and TIT2 intuitionistic fuzzy hybrid aver- aging based on Frank norm operation laws. Furthermore, based on these op- erators, an approach to multi-criteria decision-making, in which assessments are in the form of TIT2 intuitionistic fuzzy numbers has been developed. A practical example to illustrate the decision-making process has been presented and compared their results with the existing operator results.