Table 2.

Scaling method.

No	Importance level	A ij assignment
1	i and j two elements are equally important	1
2	i element is slightly more important than the j element	3
3	i element is significantly more important than the j element	5
4	i element is strongly more important than the j element	7
5	i element is extremely important than the j element	9
6	i elements are slightly less important than j elements	1/3
7	i elements are significantly less important than j elements	1/5
8	i element is strongly less important than the j element	1/7
9	i elements are extremely less important than j elements	1/9