A carrier invoice can add detention, liftgate, address correction, or redelivery fees after the original shipment cost was approved. Posting the total to freight expense leaves nobody a clean way to test those additions.
A workable freight accessorial charges schedule names the entity, period, currency, source systems, cutoff, preparer, and reviewer. It also records the report filters and extraction time. Those details let the next reviewer reproduce the work instead of trusting an unexplained total.