The Portfolio Balanced Risk Index Model and Analysis of Examples of Large-Scale Infrastructure Project

Table 5

The Importance scale.

Importance scale	Meaning
1	Comparison between two factors, the former is equally as important as the latter
3	Comparison between two factors, the former is slightly more important than the latter
5	Comparison between two factors, the former is obviously more important than the latter
7	Comparison between two factors, the former is strongly more important than the latter
9	Comparison between two factors, the former is extremely more important than the latter
2, 4, 6, 8	Median value of above judgment
Inverse	If the importance percentage of factor and factor is , then the importance percentage of factor and factor is