Practice the English vocabulary for blameless postmortems, incident reviews, and building a learning culture around system failures.
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What is a 'blameless postmortem'?
Blameless postmortems assume engineers act in good faith and make decisions with the information available at the time. The goal is to fix the system, not punish the person. This encourages honest reporting.
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How would you rewrite this blame-based sentence in blameless language? 'John forgot to test the migration script on staging.'
Blameless language shifts from 'person made a mistake' to 'system/process had a gap'. The checklist framing identifies a concrete, fixable process improvement rather than attributing fault to an individual.
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What does 'MTTR' stand for and why is it tracked?
MTTR measures incident response effectiveness. Teams track it alongside MTTD (detection) and MTTF (failure frequency). Improving MTTR might mean better runbooks, faster on-call paging, or more automation.
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What is the purpose of 'contributing factors' in an incident review?
Contributing factors acknowledge that incidents are multi-causal. A missing test AND a deployment without monitoring AND an alert threshold too high all contributed — fixing only one does not fully prevent recurrence.
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What does 'five whys' technique produce in an incident review?
Five whys drills down from symptom to root cause: Why did users see errors? → DB failover failed. Why? → No standby configured. Why? → Cost-cutting decision. Why approved? → No documented risk review process. Root cause: missing risk review gate.
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What is an 'action item' in a postmortem and what makes it effective?
Effective action items are SMART: Specific (add smoke test), Measurable (to deployment pipeline), Assignable (Alex), time-bound (by next sprint). Vague actions like 'improve monitoring' rarely get done.
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What does 'learning review' (used by some organizations instead of 'postmortem') emphasize?
Some organizations replace 'postmortem' (which implies death/failure) with 'learning review' to emphasize the positive outcome: knowledge gained. This framing reinforces that incidents are learning opportunities, not failures to be punished.
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How would you facilitate a postmortem discussion to surface honest input?
Good postmortem facilitation creates psychological safety: set blameless norms explicitly, ask questions that assume good intent, and amplify quieter voices. Senior presence can suppress candid input if not managed.