Table 1 Scale of valuation in the pairwise comparison process.

From: Near-Earth object hazardous impact: A Multi-Criteria Decision Making approach

Labels

Verbal judgments of preferences between i and j criteria

Saaty’s scale

(EI)

Ci and Cj are equally important

1

(S + I)

Ci is slightly more important than Cj

3-1/3

(St + I)

Ci is strongly more important than Cj

5-1/5

(VSt + I)

Ci is very strongly more important than Cj

7-1/7

(Ex + I)

Ci is extremely more important than Cj

9-1/9

  1. This scale is used in AHP methodology to carry out comparisons between pairs of criteria lying in the same level of a hierarchy.