Explosion of Multilevel BoMs

Dear all,

We are using SCM 4.1,Is there any way to calculate dependant demand for mutilevel BoMs.

Example : The product "A" is parent product which having coponent B and C and product "B" having its own BoM ,which contain component "D",all the materials were maintained in APO .

Now is there any way to calculate the demand quantity for Component "D" while executing the parent product "A".

Thanks in advance.

Regards,

Prabhu.