Risk Assessment of EPB Shield Construction Based on the Nonlinear FAHP Method

Table 3

Coupling matrix of EPB shield construction risk identification.

Scale	Definition	Explanation
0.5	Equally important	The two factors are equally important.
0.6	Slightly more important	One factor is slightly more important than the other.
0.7	Obviously important	One factor is clearly important than the other.
0.8	Much more important	One factor is much more important than the other.
0.9	Extremely important	One factor is extremely important than the other.
0.1, 0.2, 0.3, 0.4	Converse comparison	If factor is compared with factor to get judgment , then factor is compared with factor to get judgment