Record enrichment
Assembled once, checked twice.
Criteria are drafted, reviewed and fixed before assembly starts. Each pass is reversible, so a filter can be loosened without starting again. Columns without a written meaning are left out rather than shipped undocumented.
Hand-off
Delivered in the format your systems take, with the field definitions written down.
Count reconciliation after build
Re-running the figure against the finished extract, so the two cannot drift apart unnoticed.
Match confidence
Separating confident pairs from probable ones, and reporting the latter rather than folding them in silently.