MTTR (Mean Time to Repair) or the average time to resolve network faults. It is a measure that indicates the work efficiency and is one factor that may have contributed to the quality of services declined.
If we take more time to fix the broken network, it will chance the risk problems caused by broken off other, that may be stacked up until double fault occurred and its impacts to service. If we can reduce the MTTR, will increase the work efficiency of workers and maintain the satisfaction of customers.