Numbers and Numbers and Records and Books _ must be trackable Referring to "invoice #9048," rather than "That invoice I sent you last month, I think on a Tuesday," is much easier to track for both you and your client. Assign numbers to your invoices systematically, consistently and chronologically. Some people number their invoices by year (for example, 2009043 would be the 43rd invoice of 2009). You could also specify a code for the project. For example, ABC06 would be the 6th invoice for the ABC project that you're currently working on. Having an invoice and project numbering system keeps everything in line.
Another outcome is an increase in efficiency; the AP department can instantly find an invoice without having to waste time chasing the business users. With approximately 70% of the invoices now matching the PO immediately, a considerable amount of invoices only require scanning, after which the process is entirely automated. This efficiency has directly resulted in a reduction in the number of people required in the Accounts Payable department; before the system was installed the team consisted of 13 people and there have been reductions in headcount, as the AP manager substantiates: "The IMS system has increased efficiency in our Accounts Payable department to such an extent that on full implementation we expect to reduce our headcount by 4."