Hi Ann,
As I know in standard SAP-ECC we don't have any solution. Co-product is one work around for this.
Recently I gone through your blog A tragedy after reading that I don't want to give you the solution like such planning can be done in APO with discrete optimization.
You can have very high storage cost of your SFG X product, the optimizer will want to consume the production of the SFG quantity in the same bucket. This means that the stock of SFG products should always be 0 or constant. And discretion will help you to keep lot size 1000 of SFG as hard constraint. And your FG product will be plan by taking SFG constraint in considerations and non-delivery cost and delay penalty of FG products.
Regards,
R.Brahmankar
