A New Maintainability Evaluation Method Based on Virtual-real Fusion Scene Construction

Table 2

Evaluation value and standard of accessibility index.

The evaluation criteria of accessibility index	The value of accessibility index
Tools/hands are fully accessible to the repair parts and the joint angle does not exceed 10% of the central angle	0.8–1.0
Tools/hands are fully accessible to the repair parts and the joint angle exceeds the central angle by 10% but not more than 30%	0.7
Tools/hands are fully accessible to the repair parts and the joint angle exceeds the central angle by 30% but not more than50%	0.5
Tools/hands are fully accessible to the repair parts and the joint angle exceeds the central angle by 50% but not more than 70%	0.3
Tools/hands are not allowed to touch the repair parts	0.1