Postmortems or how we learn from facaps

If the purpose of the meeting is to find and punish someone who has made a mistake, the participants become defensive, hide their doubts, and simplify the story. The organization loses data on why the action seemed reasonable at the time. The Blameless approach comes from a different place: people acted within the available information, tools and pressure. It is necessary to understand what conditions made the error possible and why the system did not stop it earlier. Responsibility remains, but is transferred from the individual to improving the circuit.

A good postmortem doesn’t measure severity with fancy text or stop at the phrase “human factors.” It captures the impact on users and business, participants and affected components, sequence of events, detection, response and recovery. Then separates the immediate trigger from the root and associated causes. This chronology creates a common understanding between development, operations, and owners of neighboring systems.

The process begins with criteria: which incidents require separate analysis and who initiates it. The owner collects the facts and timeline, the participants jointly test the assumptions, and then the document is published to the affected teams. Facilitation is important: the discussion should return to the design of the system, and not to the assessment of people. The template lowers the threshold and helps you remember impacts, causes, successes, and discovery gaps.

The main solution is a small set of action items with owners and deadlines. They can prevent recurrence, detect a similar failure more quickly, limit the blast radius, or improve recovery and communication. The abstract “be more careful” is not an action. The item must change code, configuration, monitoring, test, documentation or process.

Analysis of the unsuccessful release showed that fixing the defect alone is not enough: we need a more secure delivery, a clear rollback and monitoring of key signals after the release. In another case, the dependence on a shared service turned out to be more critical than the teams thought. The incident made visible not only the technical connection, but also the absence of the owner, the agreements and the degradation scenario. The dependency map has become as important as fixing a specific component.

The infrastructure case with network configuration reminded us that infrequent manual operations are especially dangerous: knowledge lives with a few people, verification is incomplete, and an error quickly affects many products. Solutions are shifting towards automation, peer review, auditable changes and incremental implementation. The common lesson of all stories is that the value of an accident is not for its unique cause, but for the opportunity to strengthen several protective layers and spread knowledge beyond the affected team.