Batch number

A batch number is a code assigned to a group of items produced, purchased, or received at the same time under the same conditions. Unlike a serial number - which identifies a single individual unit - a batch number covers every item in that group. And unlike a job number, which tracks the work order or project, a batch number follows the physical goods themselves, from the point of production or receipt through to delivery.

Why Batch Numbers Matter for Recalls and Quality Control

When a problem is discovered with a product - a faulty component, an off-specification material, or a color that does not match the rest of a print run - the batch number is what makes it possible to identify every affected unit quickly. Without a batch number recorded at the point of receipt or production, the only option is to check every unit individually, or to contact the supplier with nothing more than a vague date range to work from.

In garment decoration, this is most commonly encountered as a dye lot number. Garments dyed in different lots can vary slightly in shade, even from the same supplier and the same PMS colour reference. Recording the dye lot at the point of goods receipt means that reorders or shortfall replacements can be matched to the original batch, and any visible shade difference can be traced back to source.

The same logic applies to supplier claims. If a batch of material is defective, proving when it was received, against which purchase order, and which delivery note it arrived on requires that batch number to be recorded against each of those documents.

Where Batch Numbers Sit in a Business Workflow

A batch number should be captured the moment goods arrive. On a delivery note, recording the supplier's batch number - or assigning an internal one - creates the first link in the traceability chain. That number should then carry through to the inventory record, so that any stock query can answer not just "how many do we have" but "which batch are they from."

When those materials or products move into production, the batch number should appear on the works order as well, tying the finished output back to the input materials. This matters most for businesses handling repeat orders where consistency across deliveries is visible to the end customer - including garment decorators, branded merchandise distributors, and anyone supplying decorated workwear or teamwear where a reorder must match the original dye lot.