Engineering / Free editable template

Incident postmortem timeline template

A postmortem timeline puts every event from detection to resolution on one line, so the team can see where time was lost before discussing causes. This example follows a 42-minute checkout outage caused by a deploy, then records the impact, two contributing factors, what went well and four owned actions.

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Incident postmortem timeline example showing timestamped events from deploy to all-clear, impact, contributing factors and what went well, action table with owners, due dates and status
Everything in this example is editable. Replace the labels, move the shapes and adapt the layout to your work.

How to use this template

  1. Rebuild the timeline from records

    Pull timestamps from alerts, chat, deploy logs and the status page rather than memory. Colour each event by phase, because gaps between detection and response are easier to spot when the phases are visible.

  2. Separate factors from blame

    Write contributing factors as conditions in the system, such as a timeout setting or a missing canary check. That keeps the review blameless and points the actions at things the team can change.

  3. Give every action an owner

    Replace the example actions with your own, each with one named role, a due date and a status. Review the table in your next team meeting so actions do not quietly expire.

Questions about this template

Does it work for incidents other than an API outage?

Yes. Replace the checkout API events with your own timestamped entries and rewrite the impact and contributing factors; the action table works for any incident.

Do I need an account to use it?

No. Open the template and edit it in your browser. Your work saves on this device. An account is optional if you want to sync your workspace.

Can I export the finished diagram?

Yes. Use Export in the editor to save a PNG, SVG or PDF, or download an editable .epicdraw backup.

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