RM planning by LTP & not by MRP in PP

Dear Team,

we are doing one implimentation for our client.

Where in we are planning to use MRP & LTP scenario.

I have one query regarding this as below:

We are implementing LTP & MRP demand planning, our requirement is that, SFG and FG requiremnt should be planned with MRP run and purchase order for RM should not get generated in MRP run,

But in LTP, we require planning for RM should happen, as RM lead time for procurement is 6 months(Imported material), we are planning for RM producrement by manual creation of PR,PO.

Can these be possible RM will plan by LTP and Not by MRP , with same Material master setting.

BOM structues:

FG -

SFG --- RM

Regards,

Jeevan