Key Takeaway: A purchase workflow doesn't need to be bureaucratic to be effective. It just needs a clear answer to "who can approve this, and how do we know it hasn't already been ordered."
What's on This Page
A Minimal, Effective Workflow
- Requisition: anyone can flag a need, but it goes into one shared list
- Approval threshold: orders under a set dollar amount can be approved by the buyer directly; above it, a second person signs off
- PO issued: numbered, sent to the supplier, and visible to the whole purchasing team
- Receiving check: quantity and condition verified against the PO
- Invoice match and payment: released only once PO, receiving, and invoice agree
Where Workflows Break Down
Most small-business purchase workflows fail not because they're too simple, but because step 1 (a shared requisition list) doesn't exist. So every other step happens in isolation per buyer, which is exactly how duplicate orders and unauthorized spend slip through.
See Purchase Cost Control for what this workflow actually prevents in practice.
For further reading, see the Association for Supply Chain Management (ASCM).
Checklist
- Create one shared requisition list visible to all buyers
- Set an approval dollar threshold requiring a second sign-off
- Issue numbered POs visible to the whole purchasing team
- Verify quantity and condition at receiving against the PO
- Match invoice to PO and receiving before payment
- Review the workflow periodically for steps being skipped
Common Mistakes
FAQ
Does a purchase workflow need to be complicated to work?
No. A minimal workflow with a shared requisition list, an approval threshold, and a receiving check prevents most common problems.
Where do most small-business purchase workflows actually break down?
At the first step: a shared requisition list. Without it, every other step happens in isolation per buyer.
Should every purchase require a second approval?
Not necessarily. A dollar threshold that requires a second sign-off above a certain amount balances speed and control.
How does a workflow prevent duplicate orders specifically?
By making open orders visible to everyone with purchasing authority before a new order is placed.
Calculate This For Your Business
Related Guides in the Purchasing Academy
- The Purchase Cycle Explained. the stages this workflow formalizes
- Purchase Cost Control. the cost impact of getting this right
- Purchase Orders Explained. another guide in the Purchasing Academy