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Rating, Ranking, Voting

This article delves into decision-making methods focusing on rating, ranking, and voting systems. We have previously discussed "SMART" rating systems and will enhance our understanding of ranking methods, including consensus ranking where participants assign ranks to alternatives. The article also explores various voting systems: majority voting, plurality voting, approval voting, and allocation voting, highlighting their unique features and applications. To illustrate these methods, we will conduct an experiment to select an artist for a graduation performance, examining the outcomes through six different evaluation techniques.

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Rating, Ranking, Voting

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  1. Rating, Ranking, Voting EST581 Decision Making

  2. We have already discussed rating • Including “SMART” rating systems • So we won’t look at that any more.

  3. Ranking • In consensus ranking, each participant ranks the alternatives 1, 2, …, n • With 1 being the most desirable • The decision is made based on averaging the rankings. • Note that ties are possible.

  4. Voting: Systems allowing one vote per participant • Majority voting • Winner must get majority of votes cast. • Run-offs may be necessary. • Plurality voting • Alternative getting most votes wins. • No run-off except in case of tie.

  5. Voting: Systems allowing a participant to cast multiple votes • Approval voting • Vote for as many candidates/alternatives as you approve of. • Maximum of one vote per person per alternative • Allocation voting • You are given (say) ten votes to allocate across candidates. • You may give a candidate more than one vote.

  6. Let’s do an experiment: Pick an artist to perform at your graduation. • The Beatles • Lady Gaga • Lead Zeppelin • Justin Bieber • KISS • Diana Ross • Rihanna • Taylor Swift • Elton John • Judy Garland • Martha Vaughn • Theloneus Monk • ABBA • Maria Callas • Cliff Richard • Janet Jackson • Luciano Pavarotti • Madonna

  7. We’ll use all 6 methods, separately. • Rating: 1 (best) to 10 (worst) • Ranking: 1 (best) to 10 (worst) • Majority voting • Plurality voting • Approval voting • Allocation voting (10 votes/person) • 6 tally-masters will be appointed to count votes.

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