Hello Naresh,
Your question answer with best of my knowledge.
1. Ans: It’s not required to use MF50,
Planning table MF50 is not mandatory filed to for MFBF, In both planned order confirmations and finished material confirmation.
2.Ans: In REM, MFBF possible through planned order and direct finished material, and it's not affect any business process flow problem.
3. Ans: MRP/MPS run for the finished product, planned orders created by MRP and dependent requirements created for the components.
Expert please guide me if any thing wrong.
Thanks & Regards
Umesh Mali