On-Call, Incident Response, and Incident Management Are Not the Same Thing
Many DevOps and SRE teams mistakenly treat on-call, incident response, and incident management as interchangeable terms, leading to alert fatigue and unclear responsibilities. In reality, these are three distinct stages of the incident lifecycle, collectively referred to as the SRE Trinity. On-call focuses on ensuring round-the-clock coverage through schedules, rotations, and escalation policies. Incident response deals with actively diagnosing and restoring a broken service as quickly as possible. Incident management takes the longer view, analyzing root causes and implementing changes to prevent future failures.
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