On accuracy function and distance measures of interval-valued Pythagorean fuzzy sets with application to decision making

In the present paper, a new accuracy function is provided to overcome the limitations of the existing score/accuracy functions for interval-valued Pythagorean Fuzzy Sets (PFSs). The proposed accuracy function is validated and discussed in detail through illustrative examples. Furthermore, a new distance measure for interval-valued Pythagorean fuzzy numbers is proposed and used in terms of the existing weighted averaging operators. Finally, with regard to the proposed accuracy function, distance measure, and weighted averaging operators, a numerical example of Multi-Criteria Decision Making (MCDM) process is presented to validate the methodology. (C) 2020 Sharif University of Technology. All rights reserved.