Addressable business records, assembled to a brief.
A requirement arrives in words and leaves as criteria. Each entry keeps a note of its origin and its age. What arrives is a file whose every column has a written definition.
Segment design
Deciding the cuts with you, against what the data can actually support.
Honest residue
The portion we could not verify, reported as unverified rather than as clean.
Correction
Updating what has changed, wherever a current value can be established.
If the answer is that nothing suitable exists, that is what you will be told.