Hi, I have a client that use a lot the concept of alternate/substitute materials. They have to create 2 materials masters because they aren't exactly exactly the same however for their production if the first one isn't available, they want to see if the second option could be available in case of rush production. We are implentating S4 Hana with Fiori. is there a way that prior placing the PO from the PR to have either a warning, or at least the view that another product could do the work? Before adding a Zfield into MARA/MARC table, into the material master as well as MD04 transaction, is there a way that standard SAP could do this process?