Briefing
Cutover week: invoices in two systems at once
The dangerous week is not go-live Monday. It is the stretch when the old application, the new one, and a spreadsheet can all look like the truth.
Name the authoritative list
Before cutover we ask a blunt question: if a supplier rings about an unpaid bill on Wednesday, which screen is the answer? If the team hesitates, invoices will be paid from memory and from email. We want a written rule for open invoices, goods in transit, and debit notes.
We also want the payment-file source named. Dual-running is tolerable for enquiry. Dual-running for payment is how duplicates happen.
Rehearse the messy invoices
Implementations like clean POs. Live AP does not. Partial receipts, service invoices without GR, and foreign-currency bills should be in the rehearsal. If they are left for ‘phase two’, they will be processed on the side, which means they will not be in the trail you think you just bought.
Our pre-go-live engagement exists for this week. It is timed to your calendar, and we will decline a rush if there is no room to sample.