TABLE 1.

Saaty’s 1–9 scale for pairwise comparison.

Weight intensity	Definition	Explanation
1	Equally important	Two activities contribute equally to the objective
3	Moderately important	Experience and judgment slightly favor one over another
5	Strongly important	Experience and judgment strongly favor one over another
7	Very Strongly important	An activity is strongly favored and its dominance is demonstrated in practice
9	Extremely important	The importance of one over another affirmed on the highest possible order
2,4,6,8	Intermediate weights	Used to represent compromise between the priorities listed above