The current version of Expert Choice (now part of the Decision Lens suite) offers a 30-day free trial. While it is not version 11.5, it does everything 11.5 did, plus cloud sync. If you need the software for a short-term project, this is the safest "free download."

: Allows users to see how changing the importance of one criterion affects the final "best" choice.

: Users build a "Goal" hierarchy, define "Criteria," and then perform Pairwise Comparisons . This forces decision-makers to weigh two items against each other at a time, which is psychologically easier and more accurate than ranking a long list.