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Linguistic definition of trapezoidal fuzzy numbers of probability and severity [9].
| Row | probability Qualitative scale (L) | Severity Qualitative Scale (S) | Trapezoidal fuzzy number (TPFNL, TPFNS) |
|---|---|---|---|
| 1 | Very low | Extremely unimportant | (0, 0, 0.1, 0.2) |
| 2 | low | unimportant | (0.1, 0.25, 0.4) |
| 3 | moderate | natural | (0.3, 0.5, 0.7) |
| 4 | high | important | (0.6, 0.75, 0.9) |
| 5 | Very high | Extremely important | (0.8, 0.9, 1, 1) |
