“…An alternative and increasingly popular approach is to use fuzzy sets in the setting of possibility theory [16,19,66], since they provide an acceptable trade-off between expressivity and computational difficulty. There are in fact numerous research papers where uncertain durations are represented as fuzzy numbers, mostly triangular fuzzy numbers, among others, for single machine scheduling [10], [32], parallel machine scheduling [4,49], flow shop scheduling [9,31], open shop scheduling [46], job shop scheduling [18,24,35,45,52,54,55,60,71] and [41], and for flexible job shop scheduling in [40,48,64,65] to mention but a few. Indeed, the recent review of metaheuristic algorithms to solve fuzzy job shop problems in [1] highlights the relevance of this topic.…”