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Table 2 Scales of importance for use in a pairwise comparison

From: Criteria prioritization for the sustainable development of second-generation bioethanol in Thailand using the Delphi-AHP technique

Level of importance on an absolute scale Definition Explanation
1 Equal importance Two activities contribute equally to the objective
3 Moderate importance of one over another Experience and judgment favor one activity over another
5 Essential or strong importance Experience and judgment strongly favor one activity over another
7 Very strong importance An activity is strongly favored and its dominance is demonstrated in practice
9 Extreme importance The evidence favoring one activity over another is of the highest possible order of affirmation
2, 4, 6, 8 Intermediate values between the two adjacent judgments The scores used when compromise is needed