How To Print And Scan Batch Codes For Fulfillment Operations

Batch Code An identifier printed or encoded on shipping packaging for the supply-chain purpose described by 'Batch Code'.

Capturing and transmitting batch codes reliably is a practical challenge for fulfillment centers: poor label quality, incompatible symbologies, and inconsistent placement break traceability chains. Successful implementations combine the right symbologies, label hardware, verification steps, and WMS integration so batch codes are machine-readable from the moment goods arrive until they leave the dock.

Choose The Right Symbology

Select barcode or 2D symbologies based on data length, space, and system support. Common choices include:

• GS1-128: A linear barcode that supports GS1 Application Identifiers (AIs) such as AI (10) for batch/lot numbers—widely used on pallets and cases.
• Data Matrix: A dense 2D code suitable for small packages or when you need to encode multiple fields (batch, date, serial) in one symbol.
• QR Code: Increasingly used for consumer engagement and supply-chain data; supported by most industrial scanners.

Print Quality And Hardware

Label print quality is the most common source of scanning failure. Use thermal-transfer printers and appropriate label stock for durability in your environment. Key settings and practices include:

• Resolution: Use 203–600 dpi printers depending on barcode density and label size; higher dpi for small, dense codes.
• Label materials: Select adhesive and face stock that resist moisture, temperature, and abrasion in your warehouse and transit conditions.
• Printer settings: Calibrate print darkness and speed to avoid bleeding or under-printed bars.

Verification And Standards

Implement barcode verification at print to catch errors before labels leave production. Verification checks grade codes against standards and prevents unreadable labels from entering the supply chain. Consider automating checks with inline verifiers or random sampling and reject labels below your minimum grade threshold.

Scanner Hardware And Configuration

Choose scanners that support your chosen symbology and capture environment. Fixed-mount imagers are appropriate at packing lines and conveyors; handheld imagers give flexibility for receiving and case audits. Configure scanners to:

• Enable the right decoders: Turn on GS1-128 and Data Matrix decoding in scanner firmware if you use those symbologies.
• Set timeout and aiming: Adjust aiming patterns and read timeouts to minimize missed reads in bright light or reflective environments.
• Support GS1 application identifiers: Ensure the scanner and middleware parse AI prefixes (e.g., AI (10) for batch/lot) and send structured data to WMS.

WMS Integration And Data Handling

Scanning is only useful if the WMS stores and uses the value consistently. Integrate scanning workflows so batch codes are recorded at these touchpoints:

• Receiving: Capture the batch code on pallet and case receipts and validate it against the ASN or packing list.
• Inventory record: Maintain on-hand quantities by SKU and batch to support FEFO, sampling, and recalls.
• Order allocation: Use rules to prefer batches with earliest expiry or highest quality rating.

Error Handling And Exceptions

Define clear steps when scanners fail to read a batch code or when a supplier provides an unexpected format:

• Failover capture: Use manual entry with double-entry or supervisor verification to reduce transcription errors.
• Quarantine process: If batch data is missing or unreadable, place goods in quarantine until the supplier supplies correct identifiers or re-labeling is completed.
• Label correction: Reprint and apply verified labels when original barcodes are damaged.

Practical Workflow Example

At a high-volume fulfillment center, inbound pallets arrive with GS1-128 pallet labels that include AI (10) for batch and AI (17) for expiry. An operator scans the pallet label with a fixed-mount scanner; the WMS parses the AI segments and stores batch and expiry in the receipt record. Cases are cross-checked against the pallet batch; any mismatch triggers a hold. During picking, the WMS prioritizes cases by earliest expiry and prints case-level shipping labels that include the same batch code for downstream traceability.

In short, the Batch Code must be printed, verified, scanned, and stored in a way that prevents data loss across receiving, inventory, picking, and shipping. Choosing appropriate symbologies, maintaining print quality, verifying barcodes, and integrating scanner outputs into the WMS are the operational practices that make batch codes reliable instruments of traceability in fulfillment operations.