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.