Planniing for ulternatives

My script is that we person a BOM for Material A which uses aggregate components and if 1 constituent is not disposable than its alternate is utilized instead.

Material A: Base Qty 100 gms

Component A: Qty 10 gms

Alternate Component A: 7 gms

Component B: Qty 90 gms

Now what we privation is that if Component A is not disposable Alternate Component A should beryllium utilized successful its spot Is determination anyhow however we tin instrumentality this script successful specified a mode that MRP besides generates requirements for Alternate Component A.

Thanks,

Ali