Example: Customer orders Part 12345, and i have 3 internal part numbers that can fulfill that one item?
My parts 70003, 70004, 70005 can fulfill the requirement of 12345?
Not sure if this can be done or what would need to be done in EPicor to accomplish this.
Have you looked at Alternates under Part Maintenance? There you can set up an internal part as a substitute.
In Quote and Order Entry, the button next to Revision on the Line tab is the Substitutes function. It will bring up all of the parts that can be sold in place of one another. Learned this from @timshuwy.