Every company has incidents. The difference between one that learns and one that repeats the same outage every quarter is how they respond and review. SRE formalizes this into structured incident management and blameless postmortems.
The core framework: SEV-0 through SEV-3 severity levels, each tied directly to your error budget. SEV-0 means you're burning budget at a rate that will violate your SLO within hours — every minute counts. SEV-1 is significant feature broken. SEV-2 is degraded with workaround. SEV-3 is cosmetic. Without this calibration, one engineer declares all-hands while another shrugs "it's just a blip."
During an incident, exactly four roles are assigned in the first 5 minutes: Incident Commander (owns decisions, never touches production), Operations Lead (investigates and mitigates), Communications Lead (stakeholder updates), and Scribe (timestamps every action). The playbook runs four phases: Triage (0-5min), Investigation (5-30min), Mitigation (30-90min), Resolution. The IC enforces 15-minute checkpoints — if no progress, escalate. When the incident resolves, a blameless postmortem is written within 48 hours using the 5 Whys method: start with the symptom and ask "why" five times until you hit the systemic root cause. Every action item gets an owner and a due date — no "we should look into this."
This guide includes the complete playbook template, postmortem template, and the philosophical shift that makes blameless culture work: you're not asking "who caused this" but "how did our systems allow this human error to cause an outage?"
The article includes a copy-paste postmortem template and a 4-phase incident response playbook that you can adapt to your team in under an hour. Grab both at devtocash.com
Originally published at devtocash.com
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