Importance language Scale

Trapezoidal fuzzy scale

Language rating Scale

Very low(VL)

Low (L)

The lower (ML)

Medium (M)

The higher (MH)

High (H)

Very high (VH)

(0, 0, 0.1, 0.2)

(0.1, 0.2, 0.2, 0.3)

(0.2, 0.3, 0.4, 0.5)

(0.4, 0.5, 0.5, 0.6)

(0.5, 0.6, 0.7, 0.8)

(0.7, 0.8, 0.8, 0.9)

(0.8, 0.9, 1, 1)

Very low (VP)

Low (P)

The lower (MP)

Medium (M)

The higher (MG)

High (G)

Very high (VG)