Abstract
In this paper, two new aggregation operators called the arithmetical interval-valued intuitionistic fuzzy generalized λ-Shapley Choquet (AIVIFGSCgλ) operator and the geometric interval-valued intuitionistic fuzzy generalized λ-Shapley Choquet (GIVIFGSCgλ) operator are proposed. These operators not only globally consider the importance of combinations or their ordered positions, but also overall reflect the correlations among combinations or their ordered positions. Based on the operational laws on interval-valued intuitionistic fuzzy values, the specific expressions of the AIVIFGSCgλ and GIVIFGSCgλ operators are given, which are also interval-valued intuitionistic fuzzy values. Meantime, some desirable properties are studied. Furthermore, two new approaches to multi-criteria group decision making under interval-valued intuitionistic fuzzy environment are proposed. Finally, a numerical example is provided to illustrate the developed procedures.
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