From time to time, a BUY part changes revision because the manufacturer changed specifications for the part. So things that might change would be the description, maybe the material type code, and maybe the related documents. The question arose because users wanted a place to track the changes in revision, like they can with assemblies.

PROPOSED SUGGESTION:

We are going to suggest that the users copy the old buy part to a new one with a different revision, but then they would have to keep track of why they changed both of them in a notes field for both parts.