Table 4 Visibility influence coefficient
From: A maintenance time prediction method considering ergonomics through virtual reality simulation
No | Visibility description | Scope analysis area | Visibility level | Influence coefficient |
|---|---|---|---|---|
1 | Maintenance objects and internal operations can directly be seen during the whole maintenance process | 15° scope cone | Good | 1 |
2 | Before maintenance activities, can see maintenance objects directly, but the maintenance operation is invisible due to physical or maintenance equipment/tools block | 35° scope cone | Normal | 1.3 |
3 | Maintenance objects and internal operations are not directly seen the entire maintenance process, mainly depend on the experience, feeling and skill level | Other scope cone | Bad | 1.5 |