Table 2 Meanings of the 1–9 scale of comparison vector.

1

Attribute \(\gamma_{a}\) is equally important compared to \(\gamma_{h}\)

3

Attribute \(\gamma_{a}\) is slightly more important compared to \(\gamma_{h}\)

5

Attribute \(\gamma_{a}\) is significantly more important compared to \(\gamma_{h}\)

7

Attributes \(\gamma_{a}\) are very important compared to \(\gamma_{h}\)

9

Attribute \(\gamma_{a}\) is extremely important compared to \(\gamma_{h}\)

2, 4, 6, 8

median of adjacent judgments