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Scale of relative importance used in the pairwise comparison of AHP.
| Linguistic variable | Scale of relative importance (crisp number) | Trapezoidal fuzzy number |
|---|---|---|
| Equally important | 1 | (1,1, 1,1) |
| Weakly important | 3 | (2,5/2,7/2,4) |
| Essentially important | 5 | (4,9/2,11/2,6) |
| Very strongly important | 7 | (6,13/2,15/2,8) |
| Absolutely important | 9 | (8,17/2,9, 9) |
| x = 2,4, 6,8 are intermediate scale | (x − 1, x − 1/2, x + 1/2, x + 1) |
