Table 2.
Two-level RBS decomposition of lifting operation process.
| Man risk: R1 | Machine risk: R2 | Material risk: R3 | Method risk: R4 | Environment risk: R5 |
|---|---|---|---|---|
| Low safety awareness: R11 | Equipment out of the factory with disease: R21 | Poor quality of the suspension: R31 | Improper investigation of safety hazards: R41 | Extreme weather conditions: R31 |
| Wildcat operatio: R12 | Balance of plant fault: R22 | Poor quality of spreader: R32 | Improper safety education and training: R42 | Cross operation: R32 |
| Unlicensed employment: R13 | Improper maintenance: R23 | – | There is no full-time supervisor on site: R43 | Poor hydrogeological conditions: R33 |
| Improper use of safety protective equipment: R14 | Limiter failure: R24 | – | Improper special construction scheme: R44 | Lack of on-site warning signs: R34 |
| Violate commanding: R15 | Improper equipment layout: R25 | – | Improper disclosure of construction technology: R45 | – |
| Physical discomfort on duty: R16 | – | – | – | – |
| Risk Operation: R17 | – | – | – | – |