MTT, or Mean Time to Repair, is a key performance metric used in maintenance and reliability engineering. It measures the average time taken to repair a system or component after a failure occurs. This metric helps organizations assess their efficiency in addressing issues and minimizing downtime. In addition to MTT, related metrics include Mean Time Between Failures (MTBF) and Mean Time to Failure (MTTF). While MTBF focuses on the average time between failures, MTTF measures the expected lifespan of a non-repairable system. Together, these metrics provide valuable insights into the reliability and maintainability of equipment.