3PL EDI, Decoded: The 940, 943, 944, 945, and 947 Warehouse Family

The five X12 documents that become the contract of record when you outsource fulfillment to a 3PL are the 940, 945, 943/944, and 947. These documents dictate what the 3PL must ship, when, where, and how, and how any stock transfers or inventory adjustments occur. Understanding these documents is crucial for SMBs outsourcing fulfillment as it directly impacts trust in the 3PL and prevents audit issues.

The 940, also known as the Warehouse Shipping Order, instructs the 3PL on what to ship, in what quantities, to where, and by when. It's essentially the order from the SMB to the warehouse, similar to how the 850 is the order from the retailer to the SMB. Once accepted by the 3PL, the SLA clock starts ticking, and any late or malformed 940s can be held against the SMB as if it were a fault on their part.

Upon shipment, the 945, or Warehouse Shipping Advice, is sent back to the SMB. It provides evidence of what actually left the warehouse dock and is foundational for downstream processes like building the 856 Automated Shipping Notice to the retailer. This document is critical for chargeback defense against the retailer, as any discrepancies in the 945 can lead to chargebacks being unfairly directed at the SMB.

The 943 and 944, known as the Warehouse Stock Transfer Shipment Advice and Receipts Advice respectively, track inventory moving between warehouses or facilities. These documents are particularly important for SMBs with multiple warehouse locations or when the 3PL rebalances stock across different buildings. They ensure that inventory counts remain accurate and prevent scenarios like phantom inventory due to mismatched 943 and 944 documents.

The 947, or Warehouse Inventory Adjustment Advice, is sent by the 3PL to inform about inventory changes that are not a result of shipments. This could include cycle-count corrections, damage write-offs, found stock, or shrinkage. For SMBs, reading every 947 is akin to reviewing a bank statement. Small, consistent adjustments could indicate packaging issues, while repeated corrections might signal underlying process problems. Ignoring the 947 can lead to inaccurate inventory advice being provided to trading partners.

The 856, or Automated Shipping Notice, still originates from the SMB's side, either generated from the 945 data or by the 3PL on behalf of the SMB. Regardless of how it's generated, the 856 must be detailed at the carton level and aligned with the 945 to ensure accurate shipping notices to retailers. The timing of the 856 is also crucial, as it must reach the retailer before the shipment does, and the handoff between the 945 and 856 should be timed meticulously.

For SMBs considering a 3PL, it's essential not only to verify the 3PL's EDI capabilities but also to understand which of these five documents they natively support and how the documents are exchanged. A clear understanding of the 3PL's EDI processes, along with daily reconciliation of the 940 and 945 documents, establishes a robust chargeback defense system and serves as an early-warning system for potential issues.

Additionally, consistently reviewing the 947 documents provides the ground truth of inventory, ensuring that the inventory advice given to other trading partners remains accurate and trustworthy.