Implement an EDI 856 ASN transmission with GS1-128 pallet/carton SSCC labels

Steps

1. Generate SSCC-18 values for each pallet and carton: concatenate the GS1 Company Prefix, serial reference, and a placeholder check digit position.
2. Calculate the SSCC-18 check digit using GS1 Mod-10 with alternating weights of 3 and 1 (multiply digits from right-to-left alternating 3, 1, 3, 1...), sum the products, and find the digit that makes the sum a multiple of 10.
3. Encode the SSCC-18 in a GS1-128 barcode using Application Identifier (00) followed by the 18-digit value; print on pallet/carton labels with human-readable text below the barcode.
4. Build the EDI 856 ASN with the shipment (BSN), order (PRF), pack (HL/TD5), and item (LIN/SN1) hierarchy, referencing each SSCC in the MAN segment with qualifier CP (carton) or PL (pallet).
5. Validate the 856 against your trading partner's implementation guide — hierarchy levels and MAN qualifier requirements vary by retailer.
6. Transmit via AS2 or VAN and retain the interchange control number for reconciliation against the partner's 997 functional acknowledgment.