MTTD: The Metric Behind MTTR

MTTR includes detection time. Lowering MTTD often lowers MTTR more than lowering response time.

MTTD

Time from issue start to issue detection.

Often the largest component of MTTR.

Improve

Better alerts. Synthetic monitoring. Earlier-firing thresholds.

MTTD improvements compound.

Track

Per incident: when did the issue start (per metrics) vs when alert fired.

Gap is MTTD; gap is the optimisation target.