Why it matters
Reducing MTTR limits production loss and exposes opportunities in diagnosis, access, parts, and procedures.
How it works
MTTR works best as part of a closed-loop maintenance system: define a standard, execute it consistently, review performance, and improve the standard using evidence.
A practical step-by-step process
- 1Define the purpose, scope, and accountable owner.
- 2Establish a clear standard and required data.
- 3Pilot the process on a focused set of assets or work.
- 4Train the people who execute and review the work.
- 5Track performance at a consistent operating cadence.
- 6Correct gaps and improve the standard.
Common mistakes
- Treating the metric as the goal instead of improving the work system.
- Using inconsistent definitions across teams.
- Collecting data without assigning ownership for action.
- Changing too much before the baseline is understood.
KPIs to watch
MTTR by asset
Downtime hours
Repeat repair rate
Frequently asked questions
Who should own MTTR?+
A named process owner should maintain the standard, while supervisors and frontline teams own consistent execution.
How often should performance be reviewed?+
Review operational exceptions weekly and overall trends monthly. Adjust the cadence to the risk and rate of change.
What is the best place to start?+
Start with one area, agree on definitions, establish a baseline, and improve the workflow before scaling.