To measure the financial result, follow each discrepancy through the supplier’s response and the final invoice or credit.
When you measure Mandel, keep three questions separate: what did it find, what work did it do, and what result can you prove?
Follow the money to the final record
An invoice can disagree with a PO for a legitimate reason. Check the agreement and any later changes before treating the difference as a claim.
Then follow the issue through the supplier’s response. A correction request is work done. A confirmed credit or corrected invoice is a financial result.
Illustrative invoice discrepancy
Following a $960 discrepancy through to credit
$960 of potential exposure.
A discrepancy investigated and pursued.
$960 of verified recovery.
Report identified discrepancies and verified recovery separately, counting each credit once.
Count operational results too
Not every useful result is a credit. A supplier confirmation, a complete set of quotes, or a replacement delivery can remove substantial work from your team.
Agree what completion means for each workflow. For a missing order confirmation, that means getting the supplier’s commitment and updating the order record.
Keep work waiting on a supplier or a buyer visible. Sending an escalation should not make an unresolved delivery disappear from the report.
Measure what is left for your buyers
Compare similar orders and similar time periods. Track how many jobs reach the agreed result, how long they take, and how often a buyer has to step in.
Separate time waiting on a supplier from time waiting internally. If you estimate hours saved, show the assumptions and check them with the people who do the work.
Make every number traceable
For each claimed result, retain the order, the supporting documents, the actions taken, and the final confirmation. Your team should be able to open the evidence behind the number.
A historical review helps establish a starting point. Live results show whether the work and the financial outcomes improve. Neither should rely on a universal savings promise.


