Global Trade Item Number
A Global Trade Item Number (GTIN) is a GS1 identification key that uniquely identifies trade items—products or services priced, ordered, or invoiced anywhere in the supply chain. In manufacturing and supply chain systems, it connects physical goods to item master data, enabling product lookup, barcode scanning, and traceability across trading partners.
In a manufacturing environment, GTINs identify the exact sellable unit, inner pack, case, or pallet so receiving, putaway, picking, and shipping systems can distinguish packaging levels without relying on ambiguous text descriptions. At receiving, scanning a GTIN matches an inbound carton or pallet to the correct item master record, validating that the shipment is the right SKU, packaging configuration, and trade item before booking into inventory. In warehousing, the GTIN links barcodes to WMS records, improving inventory accuracy and enabling faster location, replenishment, and order fulfillment decisions. In production and raw material control, GTINs separate similar materials or packaging variants that share a description but differ by form, size, or commercial trade unit, reducing substitution errors during issue to the line. GTINs are part of the GS1 data model used alongside lot/batch and logistics unit IDs to support traceability from receipt through shipment.
- Wrong packaging level recorded: A site may scan the GTIN for a single unit when the transaction is actually for a case or pallet, causing receiving errors, incorrect replenishment quantities, and invoice mismatches because GTINs identify specific packaging configurations.
- Item-master duplication or substitution: If similar materials are given inconsistent internal codes instead of the correct GTIN-based identity, WMS/MES transactions can split stock across duplicate records, leading to apparent shortages, overordering, and incorrect picks.
- Broken traceability at lot-sensitive operations: If GTIN is used without pairing it to lot/batch or logistics-unit data, the system can identify the product type but not the specific production instance, which weakens recall execution and root-cause tracing.
Is GTIN the same as UPC?
No. UPC is one barcode family commonly used for retail scanning, while GTIN is the broader GS1 product identity key that can be encoded in multiple barcode standards and across multiple packaging levels.
What does GTIN identify in an ERP or WMS?
It identifies the trade item, meaning the commercially distinct product or service that is priced, ordered, or invoiced, rather than the warehouse location or the shipment container.
Can one product have more than one GTIN?
Yes, different packaging levels or commercially distinct versions of the same product can have different GTINs, because GTINs are assigned to distinct trade items.