Table 1.

Linguistic terms to evaluate the alternatives ⁵¹

Linguistic terms	Interval type‐2 fuzzy sets
Very poor (VP)	((0, 1, 1, 3; 1, 1), (0.5, 1, 1, 2; 0.9, 0.9))
Poor (P)	((1, 3, 3, 5; 1, 1), (2, 3, 3, 4; 0.9, 0.9))
Fair (F)	((3, 5, 5, 7; 1, 1), (4, 5, 5, 6; 0.9, 0.9))
Medium good (MG)	((5, 7, 7, 9; 1, 1), (6, 7, 7, 8; 0.9, 0.9))
Good (G)	((7, 9, 9, 10; 1, 1), (8, 9, 9, 9.5; 0.9, 0.9))
Very good (VG)	((9, 10, 10, 10; 1, 1), (9.5, 10, 10, 10; 0.9, 0.9))

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