The Postmortem Template, 2026

Postmortem templates rot. The 2026 update with sections that drive action.

Sections

The 2026 template has seven sections in fixed order. Skip none; reorder none. The shape is the discipline. Front-matter trio (summary, timeline, customer impact) sets the facts; middle pair (contributing factors, resolution) does the analysis; back-matter pair (lessons learned, action items) drives the work that follows.

• Summary, timeline, customer impact. Front-matter trio. Three-sentence summary, timestamped events, quantified blast radius.
• Contributing factors, resolution. Multi-factor analysis and documented fix. "Factors" plural, never "root cause" singular.
• Lessons learned, action items. Back-matter pair. What we know now; what we will do; named owners and dates.
• Named owner per section. Per-section author. Supports cross-functional contribution; sections are not anonymous.

Sections to drop

Two sections that look standard but actively hurt the analysis. "Root cause" singular forces a multi-factor incident into a one-cause narrative; "what went well" slips into hagiography unless tightly bounded to "what concrete process or system actually worked."

• Root cause, singular. No-singular-root rule. Most incidents have multiple contributing factors; forcing one hides the others.
• What went well. Slips into hagiography. If kept, force concrete-process-or-system-worked specificity rather than self-congratulation.
• Documented drop list. Explicit list of removed sections per template. Catches old habits sneaking back in.
• Migration note. "We used to include X" note in the template. Catches "but we always had that section" pushback before it derails the change.

Sections to add

Two sections legacy templates miss but earn their place in 2026. "What we got lucky on" surfaces near-misses that did not break this time but might next time. "Open questions" captures what is not yet known so follow-up actually happens rather than getting lost in the closed status.

• What we got lucky on. Near-miss section per postmortem. Surfaces hidden risks that did not break this time.
• Open questions. Unresolved-at-PM-time list. Not everything closes at postmortem; documenting open questions ensures follow-up.
• Linked tickets per section. Follow-up tracking for each section's outputs. Catches "we noted it but never acted."
• Related-incidents link. Prior-incident reference per postmortem. Supports pattern recognition across the archive.