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Table 1 Definition of fuzzy numbers and corresponding membership functions for the fuzzy AHP

From: Determining the revenue contribution of logistics customer service improvements: a multi criteria decision making approach

Intensity of importance

Fuzzy number

Definition

Membership function

1

1 ˜

Equally important

(1, 1, 3)

3

3 ˜

Moderately more important

(1, 3, 5)

5

5 ˜

Strongly more important

(3, 5, 7)

7

7 ˜

Very strongly more important

(5, 7, 9)

9

9 ˜

Extremely more important

(7, 9, 9)