Linguistic expression

Fuzzy number

Very poor

(0, 0, 1, 2)

Poor

(1, 2, 2, 3)

Medium poor

(2, 3, 4, 5)

Fair

(4, 5, 5, 6)

Medium good

(5, 6, 7, 8)

Good

(7, 8, 8, 9)

Very good

(8, 9, 10, 10)