Table 3.

Linguistic scale of linguistic variable and its grey values.

Linguistic variable	Grey values
Very High (VH)	[0.75, 01.00]
High (H)	[0.50, 0.75]
Low (L)	[0.25, 0.50]
Very Low (VL)	[00, 0.25]
No (N)	[00, 00]