Move more product with a supply chain you can see end to end.

Electronic data interchange is the exchange of structured business documents between systems in a format both sides agree on; in North America that is usually ANSI X12 transaction sets such as the 850 purchase order, 855 acknowledgement, 856 advance ship notice, 810 invoice, and 846 inventory advice, with EDIFACT more common internationally. Documents travel through a value-added network or a direct AS2 connection, and large customers publish compliance guides and may charge back for late or incorrect documents. A well-built integration validates every document against the partner guide, tracks functional acknowledgements, and alerts the same day when a document is rejected.

The ERP holds financial inventory, purchasing, sales orders, and the general ledger; the warehouse management system holds physical inventory by bin and lot, directed putaway, waves, picks, and cycle counts. Both carry quantities, at different levels of detail and at different moments, which is why they disagree. A well-built architecture makes the WMS the record for physical on-hand and the ERP the record for value and orders, and reconciles the two on a schedule with every variance explained.

Available-to-promise is the quantity a customer can be promised for a date: on-hand minus allocations to open orders, plus scheduled receipts inside the horizon. Across several warehouses it also has to account for in-transit transfers, drop-ship suppliers, channel reservations, and safety stock per location. A well-built system computes one ATP figure from the same inputs for the portal, the reps, EDI, and the marketplaces, so no channel promises stock another channel already sold.

Punchout lets a buyer working inside a procurement system such as Ariba or Coupa open your catalog from within that system, build a cart at their contract prices, and return it as a requisition, with the purchase order then arriving by cXML or EDI once approved. Large accounts with formal procurement ask for it because it keeps their approval workflow intact, and some prefer a hosted catalog instead. A well-built portal supports punchout sessions and hosted catalogs on the same pricing engine as the regular storefront.

Lot numbers are captured at receipt and carried through putaway, picks, shipments, and returns so a recall query can list every customer that received an affected lot, and serial numbers do the same for individual units. Expectations depend on the product: food distributors face traceability rules such as the FDA food traceability rule under FSMA in the United States and the Safe Food for Canadians Regulations in Canada, pharmaceutical distribution has serialization rules such as the DSCSA in the United States, and medical devices carry unique device identifiers. A well-built system enforces lot capture at receiving and allocation time rather than discovering gaps at audit time.

Distributor pricing is layered: list price, customer-specific contracts, quantity breaks, promotions, and cost-plus rules, plus manufacturer rebates and special pricing agreements that reimburse you after the sale and determine the real margin on a line. Spreadsheets handle this until the first disputed invoice or missed rebate claim. A well-built pricing engine resolves the effective price per line with effective dates and an audit trail, and tracks rebate claims against the sales that earned them.

Parcel and LTL carriers expose APIs for rate quotes, labels, pickups, tracking, and proof of delivery, and LTL quotes depend on freight class, dimensions, and accessorials. Rate shopping compares every eligible carrier and service level for a shipment and picks by cost, transit time, or customer rule. A well-built shipping layer does this inside the order flow and feeds tracking back to the portal and the EDI ship notice automatically.

Most distributors start with reorder points, min and max levels, and lead-time demand per SKU and location, adjusted for seasonality and supplier reliability. Machine learning earns its place when there are many SKUs with intermittent demand and enough clean history to learn from, which is rarer than vendors suggest. A well-built replenishment tool produces explainable suggestions that buyers review and can override, and records the outcome so the model can be judged.

The item master is the record for every SKU: description, units of measure and pack conversions, supplier part numbers, GTIN or UPC, weights and dimensions, hazardous flags, and tax category. Missing weights break carrier rates, wrong unit conversions break EDI and portal orders, and duplicate SKUs break stock accuracy. A well-built project starts with an item-master audit and cleanup, because every integration downstream depends on it.

A return starts with an authorization tied to the original order line, then inspection decides restock, scrap, or return-to-vendor, and the ERP issues a credit memo against the invoice. Lot-tracked and dated products add quarantine and expiry rules, and vendor returns need their own claim tracking. A well-built system lets the customer request the RMA from the portal and keeps the credit, the stock movement, and the vendor claim linked.

Replacement makes sense when the ERP has no usable API, cannot handle multiple warehouses or units of measure, or is reaching end of support, and not when the pain is really in the gaps between systems. Odoo covers purchasing, inventory, sales, and accounting with modules that can be extended, which suits mid-sized distributors that want one platform. A well-planned migration cuts over the item master, open orders, and ledger balances in stages and keeps the WMS and EDI connectors running throughout.

In drop-ship, a line is routed to the supplier, the supplier ships directly to the customer, and the ship notice, tracking, and supplier invoice flow back for reconciliation against the customer invoice. In vendor-managed inventory, you monitor stock at the customer site, often through an EDI inventory advice, replenish automatically, and bill on consumption or on delivery depending on the agreement. A well-built platform treats both as fulfillment paths inside one order pipeline rather than separate processes.