01
A validation report
Agreement between the reconstruction and the collected values, at national, regional and category level. This is the section that tells you whether to take the rest of the report seriously.
Most offices start here. Take a closed, published round — of any programme — and run an independent reconstruction against it. Because the collected answers are already known, the exercise validates itself: you can see exactly how well the reconstruction reproduces your figures before you rely on it for anything.
What a retrospective review produces
01
Agreement between the reconstruction and the collected values, at national, regional and category level. This is the section that tells you whether to take the rest of the report seriously.
02
Every flag carries the reason it was raised and the explanation behind the estimate that raised it. Ranked, so a team with limited review capacity can start at the top and stop when it chooses.
03
Collection-unit effects, geographic patterns, category-specific reporting problems, and artifacts introduced in processing or arriving from administrative feeds. A pattern is a finding; a scattered outlier usually is not.
04
In a form suitable for internal methodological discussion — the kind of note that can be tabled at a methods meeting rather than translated first.
Why offices start here
What usually follows
If the reconstruction reproduces your figures closely and the flagged patterns turn out to be real, offices typically extend the same approach to an active round, so divergence surfaces while fieldwork can still act on it. If it does not, you have learned that cheaply, on a round where nothing was at stake. Both outcomes are useful, and we would rather you find out on a closed round than a live one.
Scope of a first review
A technical briefing identifies a suitable closed round and sets out exactly what a review of it would produce.