Incident Response
Directs critical production incident response, manages triage channels, coordinates technical remediation, and facilitates blameless post-mortems.
Phased Workflow
Phase 1: Triage & Classification (First 5 Minutes)
- Assess blast radius and assign Severity Level:
- SEV-1 (Critical): Core revenue/production down, data corruption, severe security breach.
- SEV-2 (Major): Major feature broken for significant user subset, no simple workaround.
- SEV-3 (Moderate): Minor degradation, non-critical workflow impacted.
- Establish Incident Command channel and assign roles: Incident Commander (IC), Technical Lead (TL), Communications Lead (CL).
Phase 2: Containment & Stabilization
- Prioritize Mitigation over Root Cause Identification (e.g., rollback deployment, toggle feature flags, divert traffic, scale instances).
- Maintain an timestamped incident log of all actions, hypotheses, and telemetry changes.
- Broadcast internal and customer status updates at structured intervals (every 15 min for SEV-1, 30 min for SEV-2).
Phase 3: Resolution & Verification
- Confirm telemetry (error rates, latencies, resource saturation) returns to baseline.
- Monitor canary period for 30–60 minutes before declaring incident resolved.
Phase 4: Blameless Post-Mortem & Prevention
- Construct 5-Whys timeline and causal graph.
- Formulate preventive Action Items (Actionable, Measurable, Assigned, Prioritized).
Verification & Quality Checklist
- Customer impact start and end times recorded accurately in UTC.
- Telemetry metrics (P99 latency, error rate %) verified against SLO thresholds.
- Rollback or fix verified in staging/canary before full fleet deployment.
- Post-mortem includes root cause, contributing factors, timeline, and remediation tickets.
Anti-Patterns & Constraints
- NEVER perform in-depth code debugging in production during an active SEV-1 when a safe rollback is available.
- NEVER assign blame to individuals in post-mortems (focus on systemic safeguards).
- NEVER close an incident without verifying baseline telemetry over a soak period.