Simple definition
Mean Time to Repair measures the average time required to repair or restore a failed system, based on a defined start and end point.
Purpose and use
In Mean Time To Repair, MTTR measures the average time needed to repair the selected failures.
How does it work?
Define start and end points, such as detection and verified repair, then divide accumulated durations by the relevant case count.
Example and verification
For improvement, examine time spent on detection, diagnosis, resource waiting, action and verification.
Points to watch
Organizations can also use MTTR for restore, recovery or resolution. Mixing conventions or reporting only the mean can hide very long incidents.
In short
Always state the acronym's intended meaning and measurement scope.