Free Incident Post-Mortem Template for SRE Teams (2026)
A free, copyable 5-section post-mortem template for SRE teams — plus how to run a blameless review and how SLAShield auto-drafts your PIR in under 30 seconds.
Every SRE team needs a repeatable post-mortem process. This free template (updated for 2026) gives you the exact 5-section structure the best incident-response teams use — plus how to run a blameless review and how SLAShield auto-drafts your PIR from the incident timeline.
What is a post-mortem?
A post-mortem (also called a Post-Incident Review, or PIR) is the structured document a team writes after a production incident. It answers four questions: What happened? Why did it happen? How did we respond? How do we prevent it from happening again?
A good post-mortem isn''t a status report — it''s a learning artifact. It captures the timeline, root cause, contributing factors, and concrete follow-up actions in a format that anyone in the organization can read six months later and understand what went wrong.
Post-mortems matter because incidents are the most expensive teacher your team has. If you don''t capture the lesson, you pay the tuition twice.
The 5-section post-mortem template (free, copyable)
Copy and paste the structure below into Notion, Confluence, Google Docs, or your incident tool. It''s deliberately minimal — five sections, no fluff — so teams actually complete it.
1. Incident Summary
- Incident ID: INC-YYYY-MM-DD-###
- Severity: P1 / P2 / P3 / P4
- Detected: 2026-07-02 14:03 UTC
- Resolved: 2026-07-02 14:47 UTC
- Duration: 44 minutes
- Customer impact: ~1,200 users unable to log in
- Incident commander: @jane.doe
- One-line summary: Auth service returned 500s after a database connection pool exhaustion.
2. Timeline
A minute-by-minute chronological log. Include detection, escalation, key decisions, mitigations attempted, and resolution.
| Time | Event |
|---|---|
| 14:03 | Datadog alert: auth-service error rate > 5% |
| 14:05 | On-call paged via PagerDuty |
| 14:07 | Incident channel #inc-2026-07-02 created in Slack |
| 14:12 | Root cause suspected: connection pool exhausted |
| 14:24 | Rollback of deploy #4821 initiated |
| 14:41 | Error rate returns to baseline |
| 14:47 | Incident declared resolved |
3. Root Cause
Describe the primary technical cause in plain language. Include the "5 whys" chain if useful. Distinguish the trigger (what set it off) from the underlying cause (why the system was fragile).
4. Contributing Factors
List conditions that made the incident worse or slower to resolve:
- Missing alert on connection pool utilization
- Runbook for auth-service was 6 months out of date
- On-call engineer new to the auth-service codebase
5. Action Items
Concrete, owned, dated follow-ups. Each item must have an owner and a due date, or it won''t happen.
| Action | Owner | Due | Ticket |
|---|---|---|---|
| Add pool-utilization alert | @alex | 2026-07-09 | ENG-4521 |
| Update auth-service runbook | @priya | 2026-07-16 | ENG-4522 |
| Load-test connection pool | @mike | 2026-07-23 | ENG-4523 |
How to run a blameless post-mortem
A blameless post-mortem assumes that everyone involved acted reasonably given the information they had at the time. The goal is to fix the system, not the person. Blame kills honest reporting; systems thinking makes the whole org safer.
Practical rules for the review meeting:
- Schedule within 5 business days. Memory decays fast. Do it while it''s fresh.
- Invite everyone who touched the incident — plus one facilitator who wasn''t involved.
- Ban the words "should have" and "could have." Replace with "the system allowed…" or "the signal was missing…"
- Focus 80% of the meeting on action items. The timeline is background; the fixes are the point.
- Publish the doc broadly. Post-mortems that stay in a private channel don''t create org-wide learning.
- Track action items to completion. An action item without a due date is a wish.
Post-mortem vs PIR — what''s the difference?
Practically none. "Post-mortem" is the term Google popularized in the SRE Book. "Post-Incident Review" (PIR) is the term ITIL and enterprise IT teams use. Different words, same document. Some organizations use "PIR" for the formal, signed-off version and "post-mortem" for the engineering-team internal draft — but the content is identical.
If your compliance framework (SOC 2, ISO 27001) requires "PIRs" for major incidents, your existing post-mortem template satisfies it — just name the file accordingly.
How SLAShield auto-drafts your PIR
Writing a post-mortem from scratch takes 2–4 hours per incident. Multiply that by 20 incidents a quarter and it''s a full engineering week you''re never getting back — which is why most teams skip it, and why the same incidents keep recurring.
SLAShield auto-drafts the PIR the moment an incident is resolved. The AI reads the full incident timeline — Slack messages, PagerDuty escalations, Datadog alerts, GitHub deploys, work notes — and generates a filled-in 5-section post-mortem in under 30 seconds. Your team edits, adds nuance, and publishes. Time-to-PIR drops from hours to minutes.
- ✅ Timeline reconstructed from Slack + PagerDuty + Datadog
- ✅ Root cause hypothesized from GitHub commit history
- ✅ Action items pre-populated from work notes
- ✅ Blameless language enforced by the AI prompt
- ✅ Auto-linked to the incident in the SLAShield knowledge base for future correlation
The result: every incident produces a real PIR, every PIR feeds pattern-learning, and repeat incidents drop by an average of 43% within 90 days.
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FAQ
How long should a post-mortem be?
2–5 pages for a P1/P2 incident. If it''s shorter, you probably skipped contributing factors. If it''s longer, you''re padding.
Who should write the post-mortem?
The incident commander is accountable for the document existing. The engineers involved fill in technical detail. A facilitator (often a manager or SRE lead) drives the review meeting.
Should we do post-mortems for P3/P4 incidents?
Usually no. Reserve full post-mortems for P1/P2 and any customer-visible incident. For lower severities, a short "learnings note" in the incident ticket is enough.
How do we make sure action items actually get done?
Give every action item a Jira/Linear ticket, an owner, and a due date. Review completion status in a monthly ops meeting. In SLAShield, action items auto-sync to Jira and appear on the Prevention dashboard until closed.
Do customers ever see our post-mortems?
Yes — many companies publish redacted public post-mortems for major incidents (see status.stripe.com, status.github.com). Public post-mortems build trust and are often a differentiator in enterprise sales.
What''s the difference between a post-mortem and a root cause analysis?
RCA is one section inside the post-mortem. The post-mortem is the whole document (summary + timeline + RCA + contributing factors + action items).
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