Solution : https://service.sap.com/sap/support/notes/96147 (SAP Service marketplace login required)
Key words : 
additional key words vbak-autlf, goods receipt processing time, customer requires complete delivery, confirmed sales order date, correlate delivery groups, purchase order items, purchase requisition items, sales order, purchase requisition, system subtracts
Related Notes : 
       
| 86022 | Purchase requisition with incorrect delivery date |