Traceability answers origin, location and destination
For sensitive products, the company must know where an item came from, where it is now and where it went. This can concern lots, serial numbers, expiry dates, warranties, imported items, spare parts or regulated products.
Traceability is different from a simple quantity balance. A quantity says “10 units”. Traceability explains which 10 units.
When to use lots or serial numbers
Use lot tracking when several identical units share the same production batch, expiry date or supplier batch. Use serial numbers when each unit must be followed individually, such as equipment, devices or high-value parts.
The item master should define whether tracking is required. If tracking is optional, users often skip it under pressure and the history becomes incomplete.
Movement history must stay readable
Traceability depends on stock movements. A receipt should capture supplier, document, lot or serial, date and warehouse. A delivery should show customer, destination and related lot or serial. Returns should preserve the original link when possible.
For multi-warehouse stock, transfers must keep the lot or serial identity. The company should not lose traceability because an item moved from one depot to another.
Controls
Review items sold without required lot or serial, expired lots, blocked lots, returned serial numbers, inconsistent dates and stock that exists in quantity but not in traceability detail.
For high-risk items, restrict manual corrections. A correction that changes the quantity without preserving lot or serial history weakens the entire traceability file.
Official references
Keep traceability usable
Traceability is not decoration. It is the proof that the company can identify the product, explain its history and react quickly when a batch, serial number or supplier issue appears.