“…Each one of the fuzzy goals (or constraints) of an FGP model can be represented by a fuzzy set whose membership function provides the drop in satisfaction from a situation of total satisfaction, which could be the aspiration level (where the membership function takes the value 1), to a state of total dissatisfaction, which could be the tolerance threshold or (where the membership function takes the value 0) (Delgado et al., ). One of the most common assumptions in theory (Zimmermann, ; Narasimhan, ; Hannan, ; Aouni et al., ) and applications (Rommelfanger, ; Arenas‐Parra et al., ; Mekidiche et al., ; Aouni et al., ) is that this drop can be represented by a linear function. As Verdegay () states: “It was shown that possible further changes of those membership functions do not affect the former optimal solution, … This sensitivity analysis … shows the convenience of using linear functions instead of other more complicated ones.” Therefore, for the sake of simplicity and due to the relevance of the linear case in the literature (see Jiménez et al., ; Chang, ; Huang, , among others), we focus our approach on this type of membership functions.…”