Your question is Post-Mortem Methodology. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
What is your methodology for performing a post-mortem after an incident?
Explain how you establish a blameless process, reconstruct the timeline, identify contributing factors, and distinguish root causes from symptoms. Describe how you involve stakeholders, prioritize corrective actions, assign owners and deadlines, and verify that improvements reduce recurrence risk. Include how you communicate findings and track follow-through.