A multiparameter group decision making method based on the interval-valued intuitionistic fuzzy soft set

The soft set theory, proposed by Molodtsov, can be used as a general mathematical tool for dealing with uncertainty. By analyzing the characters of the interval-valued intuitionistic fuzzy set and soft set models, the purpose of this article is to introduce the concept of the interval-valued intuitionistic fuzzy soft set and then employ its corresponding knowledge to solve multiple parameter group decision making. Finally, an illustrative investment decision problem is employed to demonstrate how to apply the proposed procedure.