Material shortages stop production lines more often than machine breakdowns in many factories. A purchase request is raised late, sits in someone's inbox for approval, the PO goes to the supplier without a clear delivery date, nobody follows up, and the material arrives a week after it was needed — or arrives on time but is rejected at inspection. Meanwhile, other material is over-ordered and fills the store. Good purchase order management brings order to this process, from the first indent to the final payment.
The purchasing cycle
- Need identified — from MRP, reorder levels, maintenance requests or department indents.
- Indent or requisition — what, how much, when needed, for which purpose or job.
- Sourcing — approved suppliers, rate contracts or quotations.
- Purchase order — created, approved and sent.
- Acknowledgement and follow-up — supplier confirms dates; buyer expedites.
- Goods receipt — material received against the PO.
- Inspection — accepted, rejected or accepted with deviation.
- Invoice matching and payment.
Each step has typical failure points. Fixing them is mostly about clear data, rules and visibility.
Indents and planning
Purchase requests should come from planning wherever possible. MRP or reorder-level logic suggests what to buy and when, based on demand, stock, open orders and lead times. Department indents for consumables, maintenance spares and services should state the required date and purpose. Indents without required dates make prioritisation impossible.
Suppliers, prices and quotations
Maintain approved suppliers for each item or category, with lead times, minimum order quantities and agreed prices or rate contracts. For items without rate contracts, collect quotations and compare them side by side — price, delivery, payment terms, quality history. Record why a supplier was chosen, especially when it is not the lowest price.
Purchase order approval
Approval rules should depend on value, category and budget: a buyer may release routine production material within limits; higher values or capital items need manager or director approval. Approvals on a phone, with the key details and attachments visible, prevent delays. Urgent orders can be flagged, but should still be recorded properly.
Clear purchase orders
A good PO leaves no room for doubt: item codes and descriptions the supplier recognises, drawing or specification revision, quantity and unit, price, tax, delivery date per line, delivery address, inspection and certificate requirements, packing instructions and payment terms. Ambiguous POs cause wrong deliveries and disputes.
Follow-up and expediting
Most late deliveries could be caught earlier. Record the supplier's confirmed date on each line. Send reminders before due dates. Keep a daily expediting list of lines that are due, overdue or at risk, sorted by impact on production. Buyers should spend their time on the lines that matter, not on calling every supplier about everything.
Goods receipt and inspection
At the gate and store, material is received against the PO: quantities checked, batch or heat numbers recorded, certificates collected. Items needing inspection go to quality before being available for use. Rejections are recorded with reasons and communicated to the supplier, and replacement or debit notes are tracked. Partial deliveries keep the PO line open for the balance.
Three-way matching
Before payment, accounts checks that the supplier invoice matches the PO price and terms and the accepted goods receipt quantity. Differences — price changes, quantity mismatches, rejected material — are flagged for resolution. This prevents paying for material that was not ordered, not received or not accepted.
Reports that help
- Open purchase orders and overdue lines by supplier and buyer.
- Material at risk for upcoming production.
- Indent-to-PO time and approval time.
- Supplier on-time delivery and rejection rates.
- Price variance against previous purchases or rate contracts.
- Purchase spend by category, supplier and department.
Supplier collaboration
A supplier portal reduces phone and email traffic: suppliers see new POs, acknowledge them and confirm dates, update dispatch details, upload invoices and certificates, and see their delivery and quality performance. Even a simple portal for the top suppliers can save buyers hours each week.
Common mistakes
- Indents without required dates or purpose.
- POs released without approval, or approvals stuck for days.
- No recorded supplier commitment dates.
- Following up only after material is already late.
- Receiving material without a PO reference.
- Paying invoices without matching to receipts and inspection.
Example
An engineering manufacturer with frequent material shortages tracked purchases in spreadsheets and emails. A purchase module was introduced with MRP-based suggestions, approval rules by value, POs with line-wise delivery dates, a daily expediting list linked to the production plan, and goods receipt with inspection. Within six months, production delays due to material fell significantly, buyers spent less time on calls, and month-end invoice disputes dropped because every invoice was matched to accepted receipts.
Summary
Purchase order management works when needs come from planning, suppliers and prices are clear, approvals are fast, POs are unambiguous, follow-up is proactive, receipts and inspection are recorded and invoices are matched before payment. Visibility of what is at risk — every day — keeps material arriving before production needs it.
Frequently asked questions
Should every purchase go through a purchase order?
Most should. Small, low-risk purchases can follow a simpler process with limits, but material for production, capital items and services above a threshold should be on approved purchase orders.
Can indents be generated automatically from MRP?
Yes. Material requirement planning or reorder levels can generate purchase suggestions, which buyers review, consolidate and convert to purchase orders.
How do we track supplier delivery commitments?
Record the promised date on each PO line, send reminders before it, and update when suppliers change commitments. Overdue lines appear on an expediting list every day.
What is three-way matching?
Checking that the supplier's invoice matches the purchase order (what was ordered and at what price) and the goods receipt (what actually arrived and was accepted) before payment.
Can suppliers update order status themselves?
Yes. A supplier portal can let suppliers acknowledge orders, confirm dates, upload dispatch details and certificates, reducing phone calls and emails.
