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Glossary

Incident

An unplanned interruption or degradation of a service that needs a response.

In Pagerless

Called a problem: a group of related signals with a level, a diagnosis and a fix.

Postmortem
A written review after an incident: what happened, the impact, the cause, and what will change so it doesn't recur
MTTR
Mean time to recovery (or restore, or resolve): the average time from an incident starting to service being restored

Updated October 22, 2026.

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