Project Delivery System Selection with Interval-Valued Intuitionistic Fuzzy Set Group Decision-Making Method

A project delivery system (PDS) is the relationship and contractual structure between the owner and the contractors of a construction project; this system defines the roles and responsibilities of the participates involved in the project. Selecting a suitable PDS is one of the keys to achieve a construction project's goals. PDS selection is a typical multi-attribute decision making problem that can be effectively solved by group decision making. Interval-valued intuitionistic fuzzy set (IVIFS) is used to solve complex decision making problems, especially multi-attribute group decision making problems, under uncertain circumstances. In this paper, a group decision making model for PDS selection is proposed using IVIFS theory as basis. In order to improve the reliability of decision making, a new decision maker weight determination method is introduced based on information utility level. Finally, the validity of the method is verified through a case study. This method can aid project owners in PDS selection.