After-action review
An after action review (AAR) is a structured review or de-brief (debriefing) process for analyzing what happened, why it happened, and how it can be done better by the participants and those responsible for the project or event. After-action reviews in the formal sense were originally developed by the U.S. Army. Formal AARs are used by all US military services and by many other non-US organizations. Their use has extended to business as a knowledge management tool and a way to build a culture of accountability.