If, during network processing, either an external material (non-stock item) or an external service (external activity/service activity) has to be procured, a purchase requisition is created. This is procesed by the purchaser, who creates on or more purchase orders. This is noted in the network.

If changes occur in the nezwork with regards to the ordered materials or services (changed quantities or dates), the sytem automatically changes the purchase requisition. However, any purchase orders that have already been created must be changed manually by the responsible purchaser.

You can use the SAP Business Workflow to inform the responsible purchaser, if based on a change in a network

• The required quantity or the requirements date of an external material or service changes or
• An external material item or external activity is deleted or
• An external activity becomes an internal activity or
• The external material or service is no longer required, because the network now has the Technically completed status
• And one or more purchase orders have been created for the purchase requisition

The purchaser receives a workitem, in which all the relevant changes that affect the external materials or services are listed. He/she can view the purchase requisitions and the existing purchase orders that are affected. It is also possible to edit the purchase orders and to create new orders.