What is after action review process?

After action review process is a concept in personal epistemology: Reviewing what happened after completing a task surfaces errors for future correction.

Example: You finish a week-long product launch. The launch went live on time, but signups were 40% below your forecast. Without a structured review, the team moves on to the next sprint. Someone vaguely recalls the landing page copy felt off. Someone else thought the email sequence started too late. These observations evaporate within days — no one writes them down, no one compares what was expected to what actually happened, and no one traces the gap to a specific cause. Six months later, the next launch repeats the same mistakes with the same vague post-mortem feelings. Contrast this with a team that runs a 45-minute post-action review within 48 hours: they document that they expected 2,000 signups and got 1,200, identify that the email sequence launched 3 days late due to a copy approval bottleneck, and create a single process change — copy approval happens in parallel with design, not sequentially. The next launch hits its number. Same team, same talent, different learning infrastructure.

This concept is part of Phase 25 (Error Correction) in the How to Think curriculum, which builds the epistemic infrastructure for error correction.