Evaluating Construction Risks of Modified Shield Machine Applicable to Soft Soils Based on Fuzzy Comprehensive Evaluation Method

Table 2

Consequence of valuation of risk events.

Degree	Valuation	Description
Slight	1	Does not result in significant loss
Medium	2	Results in a few losses
Severe	3	Results in compensable losses
Material	4	Results in significant but compensable losses
Disastrous	5	Results in uncompensable losses

where 1.5, 2.5, 3.5, and 4.5 indicate that the severity of the risk event is between the adjacent degrees.