Purchase Order Accuracy: Why 30% of POs Have Errors and How to Eliminate Them

The true cost of a single PO error#

A simple PO error — wrong quantity or incorrect SKU — generates: supplier confusion and delay (3-5 days average), internal discussion and resolution (2-3 hours of your team's time), possible reshipment cost (SGD 50-200), and inventory adjustment work. Aggregate across a business that issues 50 POs per month, 30% with errors = 15 flawed POs × SGD 300 average resolution cost = SGD 4,500 per month or SGD 54,000 annually. This is pure waste and an indicator of supplier relationship risk — suppliers who receive frequent erroneous POs reduce their engagement, increase lead times, and become less flexible on price and terms.

The most common PO errors#

Quantity mismatches: ordering 100 units when you intended 1,000 (or vice versa). SKU/item number errors: referencing an old product code or misspelling a product name. Missing or wrong specifications: colour, size, packaging, or technical specifications omitted or incorrectly stated. Pricing errors: PO issued at a price different from the last invoice or agreed quote. Delivery address or contact wrong: goods shipped to the wrong location or contact person unclear. Payment terms or incoterms inconsistent with supplier's standard or most recent agreement.

PO structure to minimize errors#

Use a standardised PO template with mandatory fields — supplier name and code, delivery address with contact, PO date, required delivery date, payment terms, incoterms. Line items include: item number (your internal code), supplier SKU, description, quantity with unit, unit price, total line price, delivery date if different from header. Add a verification checklist: has the supplier code been verified against your supplier database, are quantities reasonable for this product category, does pricing match the most recent quote, are delivery terms achievable with this supplier. Require at least two people to sign off on POs above SGD 5,000.

Automated PO validation rules#

Quantity check: flag orders where quantity is an outlier vs historical average (more than 50% above or below 6-month average). Price check: flag unit prices that differ by more than 5% from recent history. SKU validation: require supplier SKU to match against supplier's master catalogue. Delivery feasibility: cross-check required delivery date against supplier's typical lead time — flag if delivery date is impossible. Contact validation: verify delivery address and contact against approved locations.

AskBiz PO Automation#

AskBiz automates PO creation from your forecast and inventory levels, validates every PO against your rules before sending, and tracks PO accuracy metrics by supplier and category. When a PO error occurs it flags it immediately and suggests the correction. Ask it: which suppliers receive the most error-prone POs from us, what is my overall PO accuracy rate, show me the POs most likely to have quantity or pricing errors.

• 30% of SMB purchase orders contain errors — wrong quantities, incorrect SKUs, missing specifications, or pricing mismatches.
• Each error costs SGD 200-500 in resolution time, reshipment, or inventory adjustment.
• Standardised PO templates and automated validation eliminate 85% of these errors.