OPM Solution mapping with ASCP

Hi All.

I am working on implementation in process manufacturing with ASCP, we have a below scenarios.

Whenever  Customer receive demand from any sales order, they start manufacturing with generic part

Example : : Part (G) this generic part produce three different co-products like 60% X part,30 % Y part and 10% Z part , now customer wants even they receive demand (Sales order ) for  Either X,Y or Z the manufacturing should start with G part.Please suggest how I can map this in OPM and ASCP so that I can take care of demand supply mapping.

Thanks,

Ashu