Lot Trace

The question: where did this batch come from — and where did it go? Pick a lot and the trace lays out its whole life: its origin (the goods receipt line that created it, and the supplier behind that), its balances in each warehouse today, and every movement attributed to it — receipts, issues, transfers, count corrections — each one opening the document that caused it. Trace runs in both directions of an investigation: from a suspect delivery forward into every customer who received from that batch, or from a customer's complaint backward to the batch and the supplier. It is the report that turns a recall from a weekend of archaeology into an afternoon of reading.