Do you know if there is a genuine alternative parts functionality available in PPDS that functions at BOM level and not just material master level? For example if you have product with subproducts A,B,C and you want to replace subproduct C with an alternative product D - do you HAVE to create a new BOM for this or can this be set in the material master. Also would this allow you to consume all the stock of C first before its replaced with D