We are using Direct procurement scenario ,During MRP run we generate a Plan order(which have dates); which converted into Production order later.For these production order material is needed (components). And for procuring components we need to create purchase order.
Assumption :- Each component have same Procurement lead time
Our requirement is Purchase order and GI in Production order should be done sequentially, means Based on Production order date ,FIFO based Purchase orders are created and GI done in Production order. Production order with earlier production date have purchase orders earlier and we do GI in production order accordingly.