Current, reachable, and permitted - in that order.

The brief sets the boundaries; everything downstream inherits them. Location fields are made consistent before any comparison runs. Output is cut to the structure your tooling expects, tested in advance.

Field standardisation

One definition per column, applied consistently, with original values retained beside the normalised ones.

Honest residue

The portion we could not verify, reported as unverified rather than as clean.

File assembly

Records drawn together against those criteria, deduplicated, and checked for completeness.

If you need it repeatable, say so up front and we will record the definition.