Mean Time To Repair
Mean Time To Repair (MTTR) is a reliability engineering metric that measures the average time required to repair a failed system or component and restore it to full functionality. It is commonly used in IT operations, manufacturing, and maintenance to assess the efficiency of repair processes and the availability of systems. MTTR includes the time from failure detection through diagnosis, repair, testing, and return to service.
Developers should learn MTTR to improve system reliability and operational efficiency, particularly in DevOps and SRE roles where minimizing downtime is critical. It is essential for incident management, post-mortem analysis, and optimizing maintenance workflows in production environments. Understanding MTTR helps teams set realistic SLAs, prioritize fixes, and reduce business impact from outages.