If the preliminary line item is for a service order, then the goods receipt required will be generated by means of a service entry sheet. In this case, the processing proceeds with the task "XI entry sheet". As described in Invoice Approval with GR Reference in XI Workflow, the goods receipts and service entry sheets generated with the function are automatically assigned to a preliminary line item, as seen below:

The service entry sheet can only be adopted directly if the document is released at the same time as it is captured, actually generating a goods receipt document. When the data is adopted, the service-entry-sheet number is not simply updated in the existing line item (in contrast to the invoice approval with GR reference); rather, the preliminary line item is deleted and derived again. This is necessary because, in the service entry sheet, the distribution and account assignment from the purchase order can be overwritten.