I sometimes use different versions of the same exam with the questions in a different order to discourage cheating. So version 1 and version 2 of the test have the same questions used, but question 1 on version A is the same as question 12 on version B. It would be nice to be able to put in that question 1 ver-A is the same as question 12 on ver-B. That way you could still do item analysis on the questions.
Reports for multiple version exams (same questions)