Table 7.
Results of Mass function of First-level indicators.
| Primary Indicators | Excellent a,b | Good | Satisfactory | Fair | Poor |
|---|---|---|---|---|---|
| Environmental factors | 0.845 | 0.155 | 0.000 | 0.000 | 0.000 |
| Human factors | 0.861 | 0.139 | 0.000 | 0.000 | 0.000 |
| Infrastructure factors | 0.503 | 0.143 | 0.354 | 0.000 | 0.000 |
| Management factors | 0.194 | 0.678 | 0.128 | 0.000 | 0.000 |
Note: a The criterion for judging risk level come from Production Safety Law of the People’s Republic of China [47], Detailed rule for the management and control system of electricity enterperise work safety risk classification [47], and DoD standard which is approved for use by all Military Departments and Defense Agencies within the Department of Defense (DoD) [48]. b Following the standard [47,48], in our study, a five-level risk assessment standard is proposed, the description of which is excellent, good, satisfactory, fair and poor. Next, the use of 10-scores scale that defines criterion for the hazard, is generally preferable to quantitative analysis, which are excellent (8~10], good (6~8], satisfactory (4~6], fair (2~4] and poor (0~2].