Hi Durai,
1) can i maintain all the PDT in product B level and leave Product A empty ?
No , we have to maintain planned delivery time,rounding value,lot size based on the business scenario in product A too.
2) do i need to maintain MOQ and rounding value in both product A and Product B ?
Yes ,you have to maintain the lot size and rounding value as per the packing contraints of the business not same as B since B is procured externally and constraints of the supplier need not be the same as business.
Hope the above information helps.
Regards,
YRS