Postmortem Anti-Patterns: Five Templates That Quietly Destroy Learning
The shape of a postmortem decides what gets learned. Most templates select for blame avoidance; few select for change.
Why most postmortems do not change anything
A postmortem that does not result in a system change is not a postmortem; it is a confessional. The exercise is satisfying in the moment and worthless three months later.
The diagnosis: most templates ask ‘what happened’ and ‘who was on call’ but treat ‘what changes as a result’ as a small box at the end. The structure of the document signals what matters.
Five anti-patterns
- 1. The narrative-only template. Reads like a story; concludes with ‘we will be more careful.’ No verb in the action items.
- 2. The blame-shaped template. Asks ‘who deployed’ in section 1. Politicizes the rest.
- 3. The lessons-learned template. Lists insights without owners or deadlines.
- 4. The compliance template. Fills required fields; nobody reads after the meeting.
- 5. The mega-template. 20 sections; takes 4 hours to write; written rarely.
The three changes that reverse them
1. Lead with the action items. Page one. Each one has an owner, a deadline, a definition of ‘done.’
2. Replace narrative with a timeline. Times, events, decisions. The story emerges; the politics do not.
3. Track the action items in the same system as feature work. They have to compete for engineering time and win.
Action items that actually ship
- An action item that ‘considers improving X’ is not an action item. It is a wish. Action items have a verb (‘ship,’ ‘remove,’ ‘migrate’), a measurable target, and a date.
- The 30-day check: review postmortem action items at sprint planning. If they keep slipping, the document is not real to the team. Either commit to it or close the document and call it lessons-noted.
Antipatterns within antipatterns
- The 90-day review that never happens. Schedule it before the postmortem ends.
What to do this week
Three moves. (1) Replace your postmortem template’s leading section with the action-items list. (2) Add postmortem action items as work items in your sprint board. (3) Schedule a 90-day review meeting on the calendar before closing the postmortem.