Hi Rahul,
Please activate Backflush indicator to all your components in MRP2 view of material master that you can do through MM02 and MM17 in mass.
Use control key OP00 with Auto good receipt and use this control key for your last phase of master recipe.
Also in OPK4 active "All Components" tick mark for your process order type and plant combination
Then Goods receipt and goods issue will be auto posted with reference to Process order when you do the confirmation of your process order.
Regards,
R.Brahmankar