Uptime
MTTR
Mean Time To Recovery
Mean Time To Recovery (MTTR) measures the average time it takes to restore service after an incident begins. It is one of the four DORA metrics and a direct indicator of operational maturity.
In depth
MTTR is calculated as the total downtime across all incidents in a period, divided by the number of incidents. It captures the full repair cycle: detection, triage, diagnosis, fix, and verification.
A related but distinct metric is MTTD (Mean Time To Detect), which only covers the gap between failure and the moment your monitoring catches it. Improving MTTR usually starts with improving MTTD — you cannot fix what you cannot see.
Why it matters
Lowering MTTR is the highest-leverage reliability investment. Cutting MTTR from 60 minutes to 15 minutes increases effective uptime from 99.9% to 99.97% with no infrastructure changes. Automated alerting, runbooks, and incident handoffs are the standard tools.
Also known as
- Mean Time To Repair
- Mean Time To Restore
How Lemwatch helps with mttr
Lemwatch monitors mttr continuously and alerts you the moment something changes.
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Browse the full Lemwatch monitoring glossary (47 terms).