Purchase order (PO) process: a step-by-step guide for manufacturers

The purchase order process is the structured sequence a company follows to request, approve, and buy materials from suppliers. It begins with an internal indent, moves through approval and PO creation, and ends with goods receipt and invoice matching. With a clear PO process, fewer orders go wrong, spending stays within approved limits, and every purchase can be traced later.

What is a purchase order?

A purchase order (PO) is a formal document a buyer sends to a supplier that lists the items required, quantities, agreed rates, delivery date, and terms of payment. Once the supplier accepts it, the PO becomes a legally binding contract. For an SME manufacturer in India, the PO is the central document of the procure-to-pay cycle. It links the demand raised on the shop floor to the money that eventually leaves the bank.

Why the purchase order process matters

Without a defined process, purchases happen over phone calls, WhatsApp messages, and email threads that are impossible to track. This leads to duplicate orders, wrong quantities, price disputes, and payments made against goods that were never received. With a documented PO process, you can see what is being spent, approval limits are enforced, and GST records are ready when the auditor asks for them.

The purchase order process step by step

1. Raise an indent or purchase requisition

The cycle starts when a department, store, or production team identifies a need for raw material, consumables, or spares. They raise an indent (also called a purchase requisition) specifying the item, quantity, and required-by date. This is the first control point. The need is now in writing instead of a verbal request.

2. Get approval

The indent goes to the reporting manager or purchase head for approval. Many manufacturers set value-based approval limits, so a small consumable request clears quickly while a high-value order needs senior sign-off. Digital approvals remove the delay of chasing signatures on paper.

3. Float enquiries and compare quotations

The purchase team sends enquiries to shortlisted vendors, collects quotations, and compares them on price, lead time, quality, and payment terms. Putting the quotations side by side shows whether you are overpaying, and the comparison stays on record as the reason a vendor was chosen.

4. Create and issue the purchase order

Once a vendor is selected, the buyer creates the PO with item details, rates, taxes (GST), delivery schedule, and terms, then issues it to the supplier. Each PO should carry a unique number for easy tracking. The supplier confirms acceptance before dispatching goods.

5. Receive goods and raise a GRN

When the material arrives, the store team checks it against the PO and prepares a Goods Receipt Note (GRN), recording accepted and rejected quantities. The GRN updates stock and confirms what was actually delivered versus what was ordered.

6. Three-way match and payment

Before releasing payment, the accounts team does a three-way match, comparing the PO, the GRN, and the supplier invoice. If all three agree on item, quantity, and rate, the invoice is cleared for payment. Any mismatch is held for review, so you do not overpay or pay for goods that never arrived.

Common mistakes in the PO process

Typical problems include raising POs after goods have already arrived, skipping quotation comparison, no approval trail for high-value orders, and manual matching that misses price differences. Moving the process onto purchase and store management software closes these gaps, because each step has to happen in order and every record stays searchable. Teams that also track shop-floor demand through production management software can link material requirements directly to indents, reducing stockouts and rush purchases.

Manual vs. digital PO process

A paper-based PO process is slow, and errors and gaps are hard to find at audit time. A digital workflow records indents, approvals, POs, GRNs, and matching in one system, so you can see spend as it happens and pull up the full history of any order. You can explore the specific capabilities on the features page and review options on the pricing page.

Frequently asked questions

What is the difference between an indent and a purchase order?

An indent (purchase requisition) is an internal request raised by a department to signal a need for material. A purchase order is the external document sent to the supplier to actually buy that material once the indent is approved.

What is a three-way match in the PO process?

A three-way match compares the purchase order, the goods receipt note (GRN), and the supplier invoice. Payment is released only when all three agree on item, quantity, and rate, which keeps payments accurate and easy to audit.

Is a purchase order legally binding?

Yes. Once a supplier accepts a purchase order, it becomes a legally binding contract between the buyer and seller for the goods, quantities, rates, and terms listed on it.

Run your purchase orders in one system

A well-run PO process stops overpayment and keeps material reaching production on time. If you want to see how a connected indent-to-payment workflow works for an Indian SME manufacturer, book a demo and walk through it with your own data.