How to Create Product Configuration Model for 1000's of Products

We have to create Product Configuration model for 1000's of items in test and then we need to move to Destination Environment after testing. In order to create that for 1000's of item we have to do it manually for each item in test and export xml file and have to import in Destination environment. This will be a huge work as we have 1000's of Products. Is there any better process? Any suggestions? Thanks.

 Product information management > Common > Product configuration models