Practice · Blameless postmortems
What is a blameless postmortem?
A blameless postmortem investigates how the system allowed a mistake, not who made it. By treating skilled people as allies rather than causes, it surfaces the real contributing factors, produces concrete fixes, and builds the psychological safety that makes people report risks early.
How to get started with Blameless postmortems
- 1 Write a timeline from data first: alerts, deploys, dashboards, and chat logs.
- 2 Ask how the system made the mistake easy and the detection slow, not who did it.
- 3 List contributing factors and pick a few concrete, owned action items.
- 4 Share the write-up widely and thank the people who spoke up.
The common mistake
What is the most common mistake with Blameless postmortems?
Calling it blameless while still asking who pushed the button. People notice, and they stop reporting near misses.
See it in action
Postmortems Resolved calmly
The Blameless Postmortem That Changed Everything
An outage could have ended with someone blamed and nothing learned. Instead a blameless postmortem turned it into three concrete fixes and a team that started surfacing risks early.