Some multi-criteria decision methods on intuitionistic fuzzy sets and neutrosophic sets

In this thesis, concepts of fuzzy set, ıntuitionistic fuzzy set, ıntuitionistic fuzzy number are given. Cosine, Jaccard and Dice similarity measures are defined on the trapezoidal ıntuitionistic fuzzy numbers and decision making methods for multi-criteria decision making problems have been developed with this similarity measures. The concepts of neutrosophic set, single valued neutrosophic set have been given. Score and certainty functions are given for single valued neutrosophic numbers. Arithmetic and geometric operators have been defined on the single valued neutrosophic sets, including weighted arithmetic operator, ordered weighted arithmetic operator, hybrid weighted arithmetic operator, weighted geometric operator, ordered weighted geometric operator, hybrid weighted geometric operator with the defined operators, decision making methods for multi-criteria decision making problems have been developed. In addition, some numerical examples are given.