Delivery & Billing Issue

Question

HI ,
As per the Business Scenario (Textile Industry ) they will raise the Sales order for XXXXX Material 1000 meters (one line item)
while there are raising  the Billing Document (order related Billing) they want to raise different line items based on one line item in sales order (ie) example line items 10  XXXX   360 meters , 20  XXXX 500 meters , 30  XXXX 140 meters because as for the customer packing instructions we have to do like that , here material is Same. and its we have to Delivery same as Billing Document
        Here one more point sometimes billing happed 100 % w hile they are raising the Delivery partially and also based on Delivery
they will raise the Excise invoice.But as for my Knowledge Excise invoice reference Document is Billing Number but billing happed
100 % delivery happed partially so we  have to raise the partial Excise Invoice
SO how to Configure the Process in SAP can Any one give the Step by step Configuration where i have to do changes

Answer 1

No. The payer master is the same for the whole document.
This is how the delivery looks like.
                Billing status                            
Item 1        Fully processed
Item 2       Not yet
Item 3        Not Yet
Item 4       Fully processed
Item 5      Fully processed
Item 6    Fully processed
The strange thing is that, there are a few items on invoice 1, one of invoice 2 and the rest are not billed.