Call offs from purchase order

Hi,

Im currently setting up the supplier invoice flow for a customer. The current setup is based on a XML file that match the Purchase Order number from the S4 system, in order to automatically be transported further. If the XML file doesn't contain a PO number that we've in the system then the customer will need to create the supplier invoice manual.

However, the customer are now asking for the Purchase Contract module: Purchase Contract (BDM)

My questions are:
1. Is it possible to setup a job that automatically do call offs from the order based on the PO number?

The idea is that the contract will have a capped cost and several invoices will be sent to the customer referring to the specific PO.

Best regards
Olof