Incident Post-Mortem Process

Incident Post-Mortem Process

(A Blameless Approach)

The purpose of this process is to learn from incidents through open, honest discussion without assigning blame. By focusing on systemic improvements rather than individuals, we can enhance our procedures and strengthen overall resilience.

1. Incident Identification and Immediate Response

Detection & Initial Response

• Detection: Incidents may be detected via monitoring tools, alerting systems, customer reports, or team communications.

• Immediate Response:

  • Initiate the incident resolution process as soon as an issue is detected.
  • Engage the appropriate responders (operations, DevOps, and support teams) immediately.

Communication

• Inform stakeholders via predetermined channels.
• Follow established escalation procedures as outlined in our support and operational guides.

2. Assemble the Post-Mortem Team

• Incident Commander: Facilitates the post-mortem meeting and ensures an objective discussion.

• Subject Matter Experts (SMEs): Representatives from the affected systems (support, operations, and development).

• Additional Participants: Any team members involved in the incident response or who can offer insights.

3. Collect Data and Document the Incident

Timeline & Evidence Collection

• Timeline: Record a detailed chronological sequence from when the incident was detected to when it was resolved.

• Logs & Evidence:

  • Extract logs from system monitoring tools, Terraform runs, Ansible playbooks, and cloud provider CLIs.
  • Gather any manual notes, screenshots, and error messages recorded during the incident.

• Impact Assessment: Document the overall impact on customers, internal operations, and system availability.

4. Conduct a Blameless Root Cause Analysis (RCA)

RCA Meeting

• Assemble the post-mortem team for a structured, open discussion.
• Use methodologies such as the “5 Whys” or fishbone diagrams to drill down into the root causes.
• Categorize contributing factors into:
  • Technical Failures: e.g., server crashes, resource misconfigurations, load balancer issues.
  • Process Gaps: e.g., delays in communication, outdated runbooks.
  • Monitoring & Alerting Issues: e.g., thresholds set too high or missed notifications.

5. Define Corrective Actions and Preventive Measures

Action Items & Process Improvements

• Corrective Actions:

  • List clear, actionable steps to address each identified root cause.
  • Assign responsibility and set deadlines for each action item.

• Preventive Measures:

  • Update operational runbooks and support documentation accordingly.
  • Refine monitoring thresholds, alert configurations, and deployment procedures.
  • Integrate lessons learned into team training and automation processes.

6. Share and Archive the Post-Mortem Report

Internal Sharing and Debrief

• Report Publication: Publish the post-mortem report on the internal documentation site or team wiki.

• Team Debrief: Host a follow-up meeting to review the findings and address any outstanding questions.

• Feedback Loop: Encourage ongoing discussion and periodic reviews to refine the post-mortem process.

7. Continuous Improvement and Follow-Up

• Follow-Up Meetings: Schedule future sessions to verify the implementation and effectiveness of all corrective actions.

• Regular Reviews: Periodically review past incidents for recurring themes or unresolved issues.

• Process Updates: Treat this post-mortem process as a living document, updating it with new insights and feedback over time.

Final Thoughts

By treating every incident as a learning opportunity and maintaining a blameless approach, we can strengthen our systems and foster a culture of open communication and continuous improvement. If you have suggestions or questions, please discuss them with your team lead or during the next retrospective meeting.