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Table 1 9-point intensity of relative importance scale.

From: AHP-Based Evaluation Model for Optimal Selection Process of Patching Materials for Concrete Repair: Focused on Quantitative Requirements

Intensity of Relative Importance

Definition

Explanation

1

Equal importance

Two activities contribute equally to objective 1

3

Moderate importance of one over another

Experience and judgment slightly favor one activity over another

5

Essential or strong importance

Experience and judgment strongly favor one activity over another

7

Demonstrated 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

When a compromise is needed

Reciprocals of the above nonzero numbers

Reciprocal for inverse comparison

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