Milestone billing on partial quantity based
Hi My all friends
I m facing a problem
my client want to bill according to billing plan now he planned the mile stone of 10 qty like 10% against delivery, 50% against installation, 40% final invoice
but the problem is at the time of first milestone billing now we found only 5 qty is delivery now i want to bill 5 qty. But in sap when i bill 5 qty system access milestone and complete value.
not allow to bill me partially.
My requirement is that i want to bill partial quantity and rest partial quantity in other time.
example. 8 quantity received at site out of 10 and system will allow me 8 quantity to bill from first milestone. now second time 8 have been installed according to second milestone now the same invoice i want to bill 8 qty for insalltion and rest 2 qty which receive at site in single invoice.
Please suggest me ASAP
points will be awarded