Table 2.

Scale for pair-wise comparison.

Intensity of Importance	Definition	Explanation
1	Equal importance	Two activities contribute equally to the objective
3	Moderate importance	Experience and judgment slightly favor one activity over the other
5	Strong importance	Experience and judgment strongly favor one activity over the other
7	Very strong importance	An activity is favored strongly over the other; its dominance demonstrated in practice
9	Extreme importance	The evidence favoring one activity over the another is of the highest possible order of affirmation
2,4,6,8	Intermediate Values	When compromise is needed