With this process, the standard sales order automatically creates a purchase requisition for the materials to be delivered by third-party vendors.
The purchase requisition is transferred into a Purchase Order and sent to the vendor.
Once vendors have sent a shipping notification, a statistical goods receipt can be posted. Once this has taken place, customer invoices can be created and issued based on the goods receipt quantities.
After the Shipping Notification the Invoice receipt will be posted based on the invoice sent from vendor.
You can also run the process without Shipping notifications. In that case, you can create the customer billing document based on the invoice from the vendor.