MTTR
Mean Time to Repair
The average time required to restore a failed system.
Mean time to repair is the average time needed to restore a failed system to normal operation, including diagnosis, fix, and verification. It is a core resilience and incident response metric, since shorter repair times directly improve availability and reduce business impact. Reducing it depends on monitoring, spare parts, documented procedures, and skilled staff. It complements MTBF and MTTF, which describe how often failures occur, while MTTR describes how quickly the organization recovers from them.
Mean Time To Repair: how fast you fix it; lower is better.
Looking MTTR up is step one. Getting tested on it is step two.
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