External Economies Evaluation of Wind Power Engineering Project Based on Analytic Hierarchy Process and Matter-Element Extension Model

Table 1

Nine-point comparison scale.

Scale of importance	Definition	Explanation
1	Equally important	Two elements contribute equally
3	Moderately more important	One element is slightly favoured over another
5	Strongly more important	One element is strongly favoured over another
7	Very strongly more important	An element is very strongly favoured over another
9	Extremely more important	One element is most favoured over another
2, 4, 6, 8	Intermediate value	Adjacent to the two odd number scales