The after-action report nobody reads
By the time it circulates, the participants have returned to their operating priorities and the findings have lost their urgency. The document gets filed, the next exercise gets scheduled, and the same issues surface again a year later.
A format that works
A two-page memo issued within seventy-two hours, containing no more than five findings, each with a named owner, a date, and a clear statement of what will be different. The long report can follow for the file if it is required.
Five is a constraint worth respecting. An exercise will generate twenty observations; most of them are noise or already known. Choosing the five that matter is the analytical work, and handing over all twenty is a way of avoiding it.
Findings that are reviewed in front of the people who own them tend to get resolved.
Closing the loop
Take the findings back to the same executive forum that commissioned the exercise, at its next meeting. Not a separate governance committee, and not an email. The forum that asked for the exercise is the one with the standing to ask why item three is still open.
That single habit does more for program maturity than any amount of documentation.