Outside Processing scenario in ASCP

Hi,

Please suggest how to handle Outside Processing in ASCP. I am using Oracle Discrete Manufacturing.

Following is an example of Bill Of Material:

Item A (Finished Good). It is Make item. It is manufactured internally.

Item B ( Semi Finished Good). Only component of Item A. It is Outside Processing Item. Sourcing rule defined is Buy From supplier.

Item C (Semi Finished Good). It is component of Item B. It is Make item. It is manufactured internally.

Item D (Raw Material).  It is component of Item B. It is buy item.

Company provide Item C and D to Outside Processing Supplier and OSP Supplier process them and provide Item B to company.