PO Quantity vs Delivered/Ordered Quantity: What Warehouse Teams Need To Know

PO Quantity The quantity of a product requested on a purchase order line. Distinguishing this requested amount from ordered confirmations and what actually arrives is essential for accurate inventory, invoicing, and supplier performance metrics.

Buyers, suppliers, and warehouses frequently use three related but different terms: PO Quantity (requested on the PO), confirmed/accepted quantity (supplier’s acknowledgement), and delivered/received quantity (what physically arrives). Confusing these leads to reconciliation delays, incorrect stock levels, and invoicing mismatches.

Key Differences

Each term has a specific meaning and role:

• PO Quantity: Buyer’s requested amount recorded on the buyer’s purchase order.
• Confirmed Quantity: Supplier’s acceptance or acknowledgement, which may amend the PO Quantity before shipping.
• Delivered Quantity: Actual count recorded by receiving when goods arrive; used to update physical inventory.

Why The Distinction Matters

Operational and financial consequences stem from differences between these quantities:

• Inventory Accuracy: Systems update stock on delivered quantity; if PO Quantity remains unchanged, planning will be based on incorrect assumptions.
• Accounts Payable Matching: Invoice matching typically compares billed quantity to either PO Quantity or delivered quantity depending on the company’s three-way matching rules; discrepancies can block payments.
• Supplier KPIs: Fill-rate and on-time delivery are calculated relative to the PO Quantity; consistent variance can indicate supplier performance issues.

How Systems Handle Quantity Variance

ERP/WMS solutions provide workflows for each variance type. Typical behavior:

• Receive Less Than PO Quantity: The receiving module records the delivered quantity and creates a shortage exception. The system may generate a backorder or hold invoices until supplier resolution.
• Receive More Than PO Quantity: Some systems accept overages up to a tolerance and post the extra units to inventory; others require manual approval before accepting excess stock.
• Confirmed Quantity Changes: When suppliers send an order acknowledgement altering the quantity, automated change orders can update PO Quantity and notify warehouse planners.

Practical Receiving Example

Consider a PO Quantity of 1,000 eaches issued to a supplier. The supplier confirms 900 units for the ship date and delivers two cartons short, arriving with 880 units. The receiving clerk records 880 as the delivered quantity. The ERP will show 880 on-hand, a 20-unit transit/shortage discrepancy, and an outstanding backlog of 120 against the PO Quantity. AP may receive an invoice for 900 units; three-way matching will flag the invoice against delivered quantity (880) and PO Quantity (1,000) per company policy.

Who Decides Which Quantity Drives Payment And Inventory?

Policy decisions vary by organization and contract terms:

• Three-Way Matching Companies: Require invoice to match PO Quantity and received goods, often holding invoices until variances are resolved.
• Receipt-Based Pay: Authorize payment based on delivered quantity to reduce disputes but may require supplier credits for shortages.
• Contractual Terms: Supplier contracts may specify acceptable tolerances, which determine whether over/under deliveries are billable.

Practical Controls To Reduce Quantity Disputes

• Use Order Acknowledgements: Require suppliers to confirm quantities and update POs before shipping.
• Agree Tolerances: Define acceptable variance percentages in contracts to automate acceptance of small over/under deliveries.
• Leverage ASN and EDI: Advanced Shipping Notices provide expected carton counts and help receiving match delivered quantity quickly.
• Automate Matching Rules: Configure ERP to handle common variance scenarios (auto-accept overages up to X%, auto-create backorders for shortfalls).

In short, the PO Quantity is the buyer’s requested amount on the PO line and should be treated as distinct from supplier-confirmed and delivered quantities. Clear policies, standardized UOMs, and system automation keep inventory, invoicing, and supplier KPIs aligned despite normal variances.