Post-Incident Review

Overview

A post-incident review is a structured examination performed after stabilization to understand what happened, why controls and decisions behaved as they did, what impact occurred, and which improvements are required.

Post-Incident Review is closely connected to ICT Response and Recovery Plan, Incident Severity, and Internal Audit. It differs from a root-cause statement because it should examine contributing organizational, technical, process, and communication factors without reducing a complex incident to one person or component.

Operational implementation should build an evidence-based timeline, include affected teams, distinguish root and contributing factors, assess detection and response, review customer and regulatory handling, assign actions, set deadlines, and verify completion.

The principal failure modes include blame culture, shallow conclusions, missing third-party input, actions without owners, repeated recommendations, loss of evidence, and reviews that exclude business or customer impact.

Useful measures include review completion time, action closure, repeat incidents, detection improvements, overdue lessons, and control changes validated after implementation.

Operationally, teams should build an evidence-based timeline, include affected teams, distinguish root and contributing factors, and assess detection and response. Key risks include blame culture, shallow conclusions, missing third-party input, and actions without owners.

A production treatment of Post-Incident Review should test a structured examination performed after stabilization to understand what happened, why controls and decisions behaved as they did, what impact occurred, and which improvements are required within the relevant asset, decision, or service state. The Post-Incident Review context record for what impact occurred, and and which improvements are required should preserve source data, configuration or policy version, responsible actor, exception, and outcome. Review of Post-Incident Review should determine whether safeguards addressing what impact occurred, and and which improvements are required changed exposure in practice, not merely whether a document or setting existed.