Understanding Purchase Orders: Process, Types, and Real-Life Examples
What is Purchase Order?
A Purchase Order (PO) is a formal, legally binding document issued by the buyer to the seller, indicating the intention to purchase specific goods or services under agreed terms.
It includes:
- Product/service details
- Quantities
- Prices
- Delivery date
- Payment terms
Steps:
1. Requirement Identified
The buyer identifies the need for certain goods/services.
2. Buyer Prepares a Purchase Order
The buyer fills out a PO with:
- Items needed
- Quantities
- Prices (usually based on a prior Quote)
- Shipping info
- Terms and conditions
3. Buyer Signs and Sends the PO to Seller
- The PO is signed (physically or digitally).
- It's sent via email, EDI (electronic data interchange), or procurement platform (e.g., SAP Ariba, Coupa).
4. Seller Reviews the PO
- The seller verifies the PO details.
- If everything looks good, the seller accepts the PO.
NOTE: In many cases, the seller doesn’t need to physically sign — an email confirmation or acceptance in a system is sufficient.
5. PO Becomes a Legally Binding Agreement
- Once the seller accepts the PO, it becomes legally binding.
- Both parties are now committed to the terms.
6. Seller Creates a Sales Order (SO)
- The seller uses the PO to create a Sales Order (SO) — an internal document to process and fulfill the order.
- The SO is used for:
- Inventory management
- Order picking/packing
- Shipping
- Billing preparation
7. Goods Delivered & Invoiced
- After delivery, the seller sends an invoice referencing the PO and SO.
PO vs SO – What’s the Difference?
Types of Purchase Orders
Example
- A school issues a PO to a supplier to order 100 desks and chairs for a new classroom setup.
- An IT company sends a PO to Dell for purchasing 25 laptops for new hires.
- A hospital raises a PO to buy 500 PPE kits from a medical supplier.
- A restaurant creates a PO for weekly bulk orders of vegetables and kitchen supplies.
- A construction firm sends a PO to a cement supplier for 200 bags needed at a site.
- A marketing agency issues a PO to a printing vendor for 5,000 brochures for a campaign.
Purchase order template example
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