Summary

You can now walk the incident-response flow and see how it scales up into business continuity when a disruption is bigger than one incident.

In this module, you:

• Learned the NIST 800-61r3 / CSF 2.0 lifecycle behind the incident-response plan: continuous Govern/Identify/Protect readiness feeding live Detect/Respond/Recover, closed by Learn.
• Applied the single S1-S4 severity scale, the declare-high-downgrade-later principle, and the security override that always routes a security-relevant signal onto its own path regardless of apparent severity.
• Named the single-commander roles and the one rule that never bends: the Incident Commander never debugs hands-on and is never the same person as a responder.
• Saw how a runbook contains an incident class before it diagnoses, and how every S1/S2 closes with a blameless postmortem that feeds fixes back into readiness.
• Traced the business-continuity chain - BIA -> service tiers -> backup strategy and DR plan -> exercises -> WORM evidence - and the dependency order (identity, then secrets/PKI, then gateway and Core) the estate recovers in when more than one service is down.

Next steps

• ops/README.md - the entry point to both trees; return here whenever you need to find the next document rather than paraphrasing it from memory.
• incident-response-plan - re-read the full lifecycle and the compliance mapping (ISO 27001 A.5.24-A.5.28, SOC 2 CC7.3-CC7.5).
• bcp and dr-plan - the business and technical halves of business continuity, kept live by the test-and-exercise program.