Understanding Equipment MTTR
How we calculate. MTTR = sum of repair durations ÷ number of failures. The form uses the same arithmetic as the worked examples on this page. See our methodology and accuracy policy.
Real-world scenario: A typical Equipment MTTR case uses total repair time 18 and failures 6. Enter the same figures below to reproduce the worked path.
What is Equipment MTTR?
A maintainability KPI for plant assets. Distinct from DevOps/service MTTR—this page is for manufacturing equipment repair clocks.
- Start = failure detected / stopped
- End = restored to run
- Same unit for total repair time
The Formula
Worked Example
Common Use Cases
- Maintenance KPIs: repair speed
- Spare parts: response design
- OEE availability: breakdown duration
Pro Tips
- Exclude waiting for parts if policy splits Wrench time
- Segment by failure class
- Pair with equipment MTBF
Limitations: Equipment MTTR results are educational manufacturing and lean/TPM planning aids—not process-safety, quality-system, or financial advice. Confirm definitions with your MES/SCADA and quality policies.
FAQ
Same as DevOps MTTR?
Same math family, different domain—use this page for plant equipment; DevOps MTTR is for service restore.
What if failures is 0?
MTTR is undefined—enter at least one failure.
Authoritative References
For OEE and manufacturing KPI definitions, consult: