Table 1 The AHP Pair-wise comparison values or scale of preference between two elements
Preference weights or level of importance (value of a ij ) | Definition of verbal scale | Explanation |
|---|---|---|
aij = 1 | If the two criteria are equally preferred | Two activities or criteria contribute equally to the objective or goal |
aij = 3 | If criteria i is moderately preferred than criteria j | Experience and judgment slightly favor criteria over another |
aij = 5 | If criteria i is strongly preferred than criteria j | Experience and judgment strongly favor one criteria over another |
aij = 7 | If criteria i is very strongly preferred than criteria j | An criteria is strongly favored over another and its importance demonstrated in practice |
aij = 9 | If criteria i is absolutely preferred than criteria j | The evidence favoring one criteria over another is of the highest degree possible of affirmation |
2,4,6,8 | Intermediate values | Use to compromise between two judgments |