Table 4 Judgment matrix index importance level numerical scale table.

From: Research on the application of AHP-FAST-FBS in the design of home entrance disinfection devices in the post-pandemic era

Scale value

Importance level

Implication

1

Equally important

Indicator i is of equal importance compared to indicator j

3

Slightly important

Indicator i is slightly important compared to Indicator j

5

Obviously important

Indicator i is obviously important than Indicator j

7

Significantly important

Indicator i is significantly important compared to Indicator j

9

Absolutely important

Indicator i is absolutely important compared to Indicator j

2,4,6,8

Intermediate value

The importance level is between two adjacent levels

1/2,1/3…1/9

Reverse comparison

If the importance scale of indicator i over indicator j is "n", the reverse comparison is "1/n"