Email alert that will notify user if BOM formula has changed

Users would like to be notified if anything on BOM formula has been changed for production orders that do not have the status of ended. Is there an easy way to do this using the alert feature in AX 2012?

I can create a simple alert for example if an item number or route has changed but i am somewhat confused on how to add additional tables to the alert query.

Thanks,

Dereck