Social utility efficiency (SUE) is a measurement of the utilitarian performance of voting methods—how likely they are to elect the candidate who best represents the voters' preferences.[2]
It is also known as utilitarian efficiency,[3][4]voter satisfaction index (VSI)[5][6] or voter satisfaction efficiency (VSE).[7][8]
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^Shentrup, Clay (2007-07-07). "Voter Satisfaction Index". Center for Range Voting. Retrieved 2019-07-24. Voter satisfaction index, or "VSI" for short (also called "social utility efficiency" ... a lower number is actually better, and this can confuse people who are new to the concept. ... the utility units have an arbitrary magnitude, making it difficult to compare Bayesian regret figures