The problem
A familiar story.
You pull up the files from six months ago. There was the original sample file, the version sent to the first‑line reviewers, the file returned after their review, another sent for second‑level review, an adjudication file, and the final file used by the modeling team. Someone corrected labels along the way. A handful of records were removed. Another set was added. There may have been a sampling adjustment.
Somewhere in that chain is the answer. You have to reconstruct it.
What should have been a straightforward MRM question turns into hours—or days—of forensic reconciliation.