Blameless postmortem
A written incident review that asks what made the failure possible and how to prevent a repeat, instead of deciding who to blame.
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What it is
A blameless postmortem is the written record of an incident: impact, timeline, detection, response, contributing conditions, and concrete follow-up work. Blameless means starting from the assumption that people made reasonable decisions with the information and tools they had, then asking what in the system made those decisions produce a bad outcome. John Allspaw's 2012 Etsy post 'Blameless PostMortems and a Just Culture' put the name into circulation, and the Google SRE book made the format standard.
Write one after an incident that harmed users, exposed a surprising failure mode, or required a messy recovery worth teaching to the rest of the team. Build the timeline from timestamps in alerts, deploys, logs, and chat before memory rewrites the story. The useful output is a small set of owned, dated actions that improve prevention, detection, or recovery, not a polished story about one root cause.
Gotcha: blameless does not mean consequence-free or vague. Reckless behavior and policy violations still need handling, but a postmortem that names a person as the cause stops exactly where the engineering work should begin. The opposite failure is a graveyard of action items. If nobody owns them and they never enter the normal planning system, the review was documentation theater.
Ask AI for it
Write a blameless postmortem in the Google SRE format from the incident artifacts in this repository. Include an executive summary, exact user impact, detection method, a UTC timeline sourced from logs and deploy records, contributing technical and organizational conditions, what went well, what went poorly, and lessons learned. Do not name a person as a root cause. Turn every follow-up into a Jira-ready action item with one owner role, a due date, a priority, and a verification step, grouped under prevention, detection, and mitigation. Mark missing evidence as unknown instead of inventing it.