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Triangular fuzzy number of linguistic variables used in this study (Saaty and Vargas, 2008, Vahidnia et al., 2009).
| Linguistic variables | Triangular fuzzy numbers | Reciprocal triangular fuzzy numbers |
|---|---|---|
| Extremely strong | (9,9,9) | (1/9, 1/9, 1/9) |
| Very strong | (6,7,8) | (1/8, 1/7, 1/6) |
| Strong | (4,5,6) | (1/6, 1/5, 1/4) |
| Moderately strong | (2,3,4) | (1/4, 1/3, 1/2) |
| Equally strong | (1,1,1) | (1,1,1) |
| Intermediate | (7,8,9), (5,6,7), (3,4,5), (1,2,3) | (1/9, 1/8,1/7), (1/7, 1/6,1/5), (1/5, 1/4,1/3), (1/3, 1/2,1) |
