What is the purpose of a post-incident debrief or after-action review?

• A. To assign blame to individuals
• B. To publish a public report immediately
• C. To capture lessons learned, update policies and controls, and prevent recurrence.
• D. To end the security program

Answer: (C)

The main idea here is turning an incident into useful improvement. After an incident, a post-incident debrief focuses on what happened, why it happened, what worked well, and what didn’t, with the goal of turning that information into concrete actions.

This is about capturing lessons learned and using them to strengthen the program. By identifying root causes, gaps in controls, and weaknesses in detection or response, teams can update policies, procedures, and technical controls. The outcome is a set of actionable changes—owners, deadlines, and follow-up—to prevent the same issues from recurring and to raise overall readiness for future incidents.

A key part of the approach is being blameless and constructive. The purpose isn’t to point fingers at individuals, but to improve systems, processes, training, and coordination. It’s also not about publishing a public report right away; the debrief tends to be an internal, timely assessment aimed at rapid improvement. And it certainly isn’t about ending the security program; it’s about strengthening and evolving it to reduce risk going forward.

So, the purpose is to capture lessons learned, update policies and controls, and prevent recurrence.