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Training Camp • Cybersecurity Glossary
Lessons Learned is the post-incident review phase of incident response that analyzes the event to improve future detection and response.
Lessons Learned Definition: Lessons Learned is the post-incident review phase of incident response that analyzes the event to improve future detection and response.
Lessons Learned is the final phase of the incident response lifecycle, in which the response team conducts a structured post-incident review to analyze what happened, how effectively it was handled, and what improvements should be made. Often held as a post-incident meeting shortly after recovery, it documents root causes, timeline gaps, and control weaknesses to strengthen future detection and response. In the NIST incident handling guide this corresponds to the post-incident activity phase, feeding improvements back into preparation.
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