Apply Five Whys to identify a fixable process cause behind duplicate payment.
AP paid an original invoice and a rebill for the same service period because the rebill used a new invoice number. Five Whys: follow cause and effect until the fix points to the process, not just the person The trap is stopping at 'the processor missed it,' which creates blame without a stronger control. Why 1 Why was the duplicate paid? The rebill was entered and approved as a new invoice. This identifies the visible event, not the root cause. Why 2 Why was it treated as new? The duplicate check matched exact invoice number and supplier only. Now the…
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