Linguistic variable

Trapezoidal fuzzy numbers

Very high (VH)

(8, 9, 9, 10)

High (H)

(7, 8, 8, 9)

Fairly high (FH)

(5, 6, 7, 8)

Medium (M)

(4, 5, 5, 6)

Fairly low (FL)

(2, 3, 4, 5)

Low (L)

(1, 2, 2, 3)

Very low(VL)

(0, 1, 1, 2)