Identifying appropriate project delivery systems for wastewater treatment plants (PDSWTPs) plays an important role industry decision makers. This study aims to develop a PDSWTP selection model deal with the related-indicators case by combining advantages of Pythagorean fuzzy sets and Bonferroni mean operators. The works this are as follows: 1) related indicators is innovatively considered speci...

Complex intuitionistic fuzzy sets (CIFSs), characterized by complex-valued grades of membership and non-membership, are a generalization standard (IF) that better speak to time-periodic issues handle two-dimensional data in solitary set. Under this environment, article, various mean-type operators, namely complex IF Bonferroni means (CIFBM) weighted mean (CIFWBM) pr...