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Table 1 Pairwise comparison scale for AHP preferences (Kamal and Al-Harbi, 2001)

From: A group consensus model for evaluating real estate investment alternatives

Numerical rating Verbal judgments of preferences
9 Extremely preferred
8 Very strongly to extremely
7 Very strongly preferred
6 Strongly to very strongly
5 Strongly preferred
4 Moderately to strongly
3 Moderately preferred
2 Equally to moderately
1 Equally preferred