An invoice automation system is usually sold as one purchase and is really four capabilities, and they do not have to arrive together. Implementing them in an order where each delivers value on its own is both lower risk and faster to benefit than a single large implementation that pays nothing until it is finished.
First: the record and the workflow
An invoice record with statuses, owners and ages, and approvals happening on it rather than in email. This delivers the largest reduction in elapsed time, because approval waiting is where the days go, and it works even while invoices still arrive on paper. It is also the foundation everything else delivers into.
Second: capture
With a record in place, capture has somewhere to deliver and pays back immediately in keying and transcription errors. Its value depends on arrival channels being consolidated first, which is free and takes a quarter of persistence with suppliers and colleagues, so start that early even though the software comes later.
Third and fourth: matching and payment
Matching depends on purchase orders and receipts existing, which is upstream work rather than a software setting, so it delivers once that discipline is in place. Payment execution is the most mechanical and the least urgent, and it is worth doing last because its controls deserve attention that a busy implementation will not give them.
Questions people ask about invoice automation system
Can we buy it all at once and phase the rollout?
Yes, and that is often sensible commercially. What matters is the order of implementation rather than the order of purchase.
What if matching is our main problem?
Then the upstream work comes first, because matching software cannot compare documents that do not exist.
How long should each phase take?
Weeks rather than quarters if the phases are genuinely separable. A phase that cannot deliver on its own has been drawn wrongly.