“…During the years, many authors such as Chen [40] ; Negi et al [44] , Chen et al [41] ; Chen and Hwang [45] ; Chen and Tzeng [46] ; Jahanshahloo, Hosseinzadeh Lotfi, and Izadikhah [47] ; Liang [48] ; Wang and Elhag [49] ; Wang and Lee [50] ; Wang, Luo, and Hua [51] ; Yeh, Deng, and Chang [52] ; and Yeh and Deng [53] , and Zare Mehrjerdi [54,55] have contributed new materials on the development, extensions and applications of TOPSIS since its early development in 1981. Its general extension for group decision making problems under fuzzy environment was published by Chen [40] .…”