In this paper, we present a new method for multicriteria fuzzy decision making based on interval-valued intuitionistic fuzzy sets, where interval-valued intuitionistic fuzzy values are used to represent evaluating values of the decision-maker with respect to alternatives. First, we propose a new method for ranking interval-valued intuitionistic fuzzy values. Based on the proposed fuzzy ranking method of interval-valued intuitionistic fuzzy values, we propose a new method for multicriteria fuzzy decision making. The proposed multicriteria fuzzy decision making method outperforms Ye's method (2009) due to the fact that the proposed method can overcome the drawback of Ye's method (2009), where the drawback of Ye's method is that it can not distinguish the ranking order between alternatives in some situations. The proposed method provides us with a useful way for dealing with multicriteria fuzzy decision making problems based on interval-valued intuitionistic fuzzy sets.

This paper presents a new method for multicriteria fuzzy decision making based on the ranking interval-valued intuitionistic fuzzy values, where interval-valued intuitionistic fuzzy values are used to represent evaluating values of the decision-maker with respect to alternatives. We propose a new method for ranking interval-valued intuitionistic fuzzy values. Based on the proposed fuzzy ranking method of interval-valued intuitionistic fuzzy values, we propose a new method for multicriteria fuzzy decision making. We also use an example to illustrate the multicriteria fuzzy decision making process of the proposed method. The proposed method provides us with a useful way for dealing with multicriteria fuzzy decision making problems based on ranking interval-valued intuitionistic fuzzy values.

In this paper, we propose a new fuzzy multiple attributes group decision making method based on ranking interval type-2 fuzzy sets. We present a new method for ranking interval type-2 fuzzy sets. Then, we present a new method for fuzzy multiple attributes group decision making based on the proposed ranking method of interval type-2 fuzzy sets. The proposed method is simpler than the existing methods for fuzzy multiple attributes group decision making based on interval type-2 fuzzy sets.

In this paper, we present a new method to deal with fuzzy multiple attributes group decision-making problems based on ranking interval type-2 fuzzy sets. First, we propose a new method for ranking interval type-2 fuzzy sets. Then, we propose a new method for fuzzy multiple attributes group decision-making based on the proposed ranking method of interval type-2 fuzzy sets. We also use some examples to illustrate the fuzzy multiple attributes group decision-making process of the proposed method. The proposed method is simpler than the methods presented in Chen and Lee, 2010a, Lee and Chen, 2010b for fuzzy multiple attributes group decision-making based on interval type-2 fuzzy sets. It provides us with a useful way for dealing with fuzzy multiple attributes group decision-making problems based on interval type-2 fuzzy sets.