A Multistakeholder Approach to the Airport Gate Assignment Problem: Application of Fuzzy Theory for Optimal Performance Indicator Selection

Table 1

Membership function of linguistic scales.

Degree of importance	Fuzzy rating	TraFN
Equally important	1	(1, 1, 1, 1)
Intermediate	2	(1, 1.8, 2.2, 3)
Weakly more important	3	(2, 2.8, 3.2, 4)
Intermediate	4	(3, 3.8, 4.2, 5)
Important	5	(4, 4.8, 5.2, 6)
Intermediate	6	(5, 5.8, 6.2, 7)
Very important	7	(6, 6.8, 7.2, 8)
Intermediate	8	(7, 7.8, 8.2, 9)
Extremely more important	9	(9, 9, 9, 9)