Every team experiences incidents. The teams that grow stronger from them are the ones that take postmortems seriously — not as blame sessions, but as structured learning opportunities.

Yet most postmortems end up as a wall of text nobody reads twice, filed away and forgotten until the same incident happens again six months later. This guide walks you through writing postmortems that genuinely change how your team operates.

What Is an Incident Postmortem?

A postmortem (also called a post-incident review or retrospective) is a written document that captures what happened during an incident, why it happened, and what actions will prevent it from recurring.

The term comes from medicine.…