Blameless Postmortem
Version 1.0.0 · Updated 2026-07-30
CORE DEFINITION
In incident retrospectives, assume all participants acted in good faith and made the best decisions based on the information available at the time. It is strictly forbidden to blame 'who messed up'; instead, focus on 'where did the process/system fail that allowed good people to make mistakes'.
SCAFFOLDING EFFECT
Reduce cognitive load
Protects honesty. Once accountability is enforced (e.g., performance deductions, public criticism), people will hide the truth and destroy evidence. Only by being blameless can we obtain the most truthful incident reports, thereby fundamentally improving the system.
Anchor fast decisions
Incidents often stem from system/process flaws rather than individual malice. Accountability causes people to hide information, making root causes invisible; blamelessness yields truthful reports, thus improving the system rather than punishing individuals.
MINIMUM ACTION
In progress 0/5Practice this model in one real situation:
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Source support: Explicit
- sre.googlehttps://sre.google/sre-book/postmortem-culture/verified
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