The best method to determine ideal business tasks for automation is to look at those repetitive, manual steps that are done by employees on a regular basis. For example, managing invoices can be a time heavy repetitive task requiring a number of personnel.  Errors in both managing invoices and paying invoices can subsequently lead to further issues including payment penalties. So a common RPA task for buyers is to extract data from an invoice that has been approved and then input it electronically into the buyer’s back-office or ERP
system. That extracted data is then available in a format that is understandable before Accounts Payable can further process it. 
And in the case of suppliers, a very common task for the Accounts Receivable process is to take the business invoice data (from billing system) and automatically transform it into a standardised e-invoicing format that can be transmitted to a customer. So both for buyers and suppliers, automation becomes that critical enabler in improving the quality of data transformation, data transmission and in reducing costs.