Table 1 Scale for pairwise comparison in the AHP29.

From: An interpretable framework for risk management in TBM excavation using expert elicitation integrated with fuzzy set theory

Intensity of the relative importance

Definition

1

Two items are considered equally

3

One is considered slightly influential over another

5

One is considered strongly influential over another

Reciprocals of above numbers

When the ith item compared to the jth item is assigned one of the above numbers, the jth item compared to the ith item is assigned to its reciprocal