Research Article
Engineering Classification of Jointed Rock Mass Based on Connectional Expectation: A Case Study for Songta Dam Site, China
Table 5
The fundamental scale of AHP (Saaty [
36]).
| Intensity of importance | Definition | Explanation |
| 1 | Equal importance | Two activities contribute equally to the objective | 2 | Weak | — | 3 | Moderate prevalence of one over another | Experience and judgment slightly favor one activity over another | 4 | Moderate plus | — | 5 | Strong or essential prevalence | Experience and judgment strongly favor one activity over another | 6 | Strong plus | — | 7 | Very strong or demonstrated prevalence | An activity is favored very strongly over another; its dominance demonstrated in practice | 8 | Very very strong | — | 9 | Extremely high prevalence | The evidence favoring one activity over another is of the highest possible order of affirmation | Reciprocals of above | If activity i has one of the above nonzero numbers assigned to it when compared with activity j, then j has the reciprocal value when compared with i | A reasonable assumption | Rational | Ratios arising from the scale | If consistency were to be forced by obtaining n numerical values to span the matrix |
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