Component don`t need Create PR till Planned order converted Production orde

Dear all

I need to realize the following request.

Component don`t need Create PR till Planned order converted Production order.

now, i don`t need PR of Component when demend is still appear Planned order, just after planned order converted into production order (Or Purchasre order, for subcontacting process), component or raw material just created pr. how to realize this ?

If possible to config a new MRP type?

Thanks in advance