“…Then, the corresponding linear membership function is defined and the minimum operator proposed by Bellman and Zadeh [50] is applied to combine all objective functions. Accordingly, in the fuzzy set theory, literatures [51,37,[52][53][54] used the standard fuzzy intersection, which represents a form of limiting factor analysis by applying the minimum operator. Thus, in the FVM-index method proposed in this study, the minimize operator is used to aggregate the membership function values of the M decision attributes.…”