weight determination and ranking priority in interval group mcdm

This study proposes a method for determining the weight of decision makers (dms) in group multiple criteria decision making (gmcdm) problems with interval data. here, an interval weight of each dm was obtained; then, the relative closeness of each decision to negative ideal solution (nis) and positive ideal solution (pis) was then computed. by using the proposed method, after weighting the decision matrix of each dm, the alternatives were ranked using interval arithmetic. a comparative example along with a real-world problem concerning the air quality assessment was given to illustrate the viability of the proposed method.