Evaluating a purchase order tool can absorb weeks of feature comparison, and one five-minute test in a trial account settles most of it. Order ten of something. Record a receipt for four. Enter an invoice for four. Then ask the tool what is outstanding. If the answer is six on that line, it is tracking properly. If it cannot answer, it is a document generator.
Why that test
Partial delivery is the normal case, not an edge case, and it is what document-level tracking cannot represent. A tool that stores an order total and an invoice total can tell you whether they match and nothing else. The moment a delivery splits, or one ordered line is invoiced twice, that model breaks and the answers come from a person again.
What else the same test reveals
Whether receipts can be recorded by somebody who is not a finance user, which matters because deliveries are taken by operational staff. Whether the invoice can be entered against a line rather than an order. And whether the outstanding figure appears on a report you can run rather than only on the order screen, which is what makes it useful at month end.
The second test: revisions
Change the price on an approved order and see whether the previous value is still visible with its date. Systems that overwrite look tidier and lose the thing you need in a supplier disagreement. Together the two tests take ten minutes and tell you more than any feature matrix.
Questions people ask about purchase order tool
What if the vendor will not give us a trial?
Ask them to demonstrate exactly that sequence on a call. A vendor unwilling to show partial receipting is answering the question.
Does every organisation need line-level tracking?
If your deliveries almost always arrive complete and on one date, order-level is workable. Most organisations discover partial deliveries are more common than they assumed.
What about over-delivery?
Test it too: receive twelve against an order for ten and see whether the tool flags it rather than silently accepting. Over-receipt is how you pay for more than you ordered.