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Intermediate Topic 34 of 50 DevOps & Tooling

Postmortems

Blameless reviews after incidents.

How it works

A postmortem is a written review after an incident that explains what happened and how to prevent a repeat. It contains a summary, impact, a timeline, root causes and contributing factors, what went well and badly, and action items with owners and dates. Blameless culture assumes people acted sensibly with the information they had and looks for weaknesses in systems, processes and tools rather than a person to blame. Techniques such as the five whys and fault trees help dig below the obvious cause. Reviews are shared widely so the whole organization learns.

Where it is used

Engineering teams hold them after outages, near misses and data loss to improve reliability and runbooks.

Common pitfall

Blaming individuals makes people hide problems, stopping at a shallow cause like human error teaches nothing and action items that are never completed make the exercise useless. Track items to completion and review them regularly.

Where it fits in the course

Postmortems is topic 34 of 50 in DevOps & Tooling, rated Intermediate. It follows Incident Response. The next topic is SLIs, SLOs and SLAs.

Practice and explore

How to study this topic

  1. Read the explanation above and restate the definition in your own words.
  2. Open the interactive lesson and answer its mini quiz.
  3. Read the common pitfall, then write a short example that avoids it.
  4. Check your understanding in the DevOps & Tooling quiz, and revisit the topic if you miss a question.

Frequently asked questions

What is Postmortems?
Blameless reviews after incidents. It belongs to DevOps & Tooling and is an intermediate-level topic.
Where do people use Postmortems?
Engineering teams hold them after outages, near misses and data loss to improve reliability and runbooks.
What is the most common mistake with Postmortems?
Blaming individuals makes people hide problems, stopping at a shallow cause like human error teaches nothing and action items that are never completed make the exercise useless.
What should I learn before this topic?
Start with Incident Response, the topic just before it in DevOps & Tooling.
How can I practice it?
Answer the mini quiz in the interactive lesson, then take the DevOps & Tooling quiz.
Is Postmortems hard to learn?
It is an Intermediate topic. Be comfortable with the Beginner topics in this area first, then read the common pitfall carefully, since it is where most mistakes happen.
How long does it take to learn Postmortems?
Most learners can read the explanation and finish the interactive lesson in under an hour. Fluency comes from applying the idea, so plan a few short practice sessions with the quiz.
Which topics are related to Postmortems?
Incident Response, SLIs, SLOs and SLAs, Tracing with OpenTelemetry are closely connected. The full list is in the related topics section of this page.
What should I study after Postmortems?
Continue with SLIs, SLOs and SLAs, the next topic in DevOps & Tooling.

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