On-callMediumoc-p110

Subject Postmortem judgmentLevel Mid–Senior~20 minCommon in Reliability & on-call interviewsIndustries Technology

Question

An incident appears resolved — error rates dropped after your mitigation. How do you decide whether to declare it fully resolved, and what's the risk of calling it too early?

What a strong answer looks like

Stop the bleeding first (mitigate), then form hypotheses from real signals. Separate root cause from symptom, communicate status as you go, and close with what prevents a repeat.

Learn the concepts

Diagram & narrate the incident

Loading whiteboard…

Run or narrate your approach, then ask the coach.