Dear Caetano,
Requirement is to have check for partial issue to match partial GR in Process Order.
Kind of Goods Issue validation before partial GR. 100% Goods Issue doesnst happen in one time. I searched lot of places here in SCN but could not found it
I believe Badi Workorder_Goodsmvt can be used but still need your help if your provide any kind of CUSTOM LOGIC or any other Customer exit to fulfill the requirement