Definite Majority Choice: Difference between revisions
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'''Definite Majority Choice''' (DMC), also known as '''Ranked Approval Voting''' (RAV) is a single-winner [[voting method]] which uses a hybrid ballot combining both ordinal ranking and approval rating. |
'''Definite Majority Choice''' (DMC), also known as '''Ranked Approval Voting''' (RAV) is a single-winner [[voting method]] which uses a hybrid ballot combining both ordinal ranking and approval rating. The method is summarized as |
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:'''While no undefeated candidates exist, eliminate the least-approved candidate.''' |
:'''While no undefeated candidates exist, eliminate the least-approved candidate.''' |
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See also [[Proposed Statutory Rules for DMC]]. |
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''Page refactoring in progress. Comments welcome.--[[User:Araucaria|Araucaria]] 11:41, 30 Sep 2005 (PDT)'' |
''Page refactoring in progress. Comments welcome.--[[User:Araucaria|Araucaria]] 11:41, 30 Sep 2005 (PDT)'' |
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== Procedure == |
== Procedure == |
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# Voters cast [[Preferential voting|ranked ballots]], ranking as many candidates as they like. Equal ranking of candidates is allowed. |
# Voters cast [[Preferential voting|ranked ballots]], ranking as many candidates as they like. Equal ranking of candidates is allowed. Write-in candidates are allowed. Unranked candidates are allowed. There are sufficient ranks to allow ranking each candidate separately, ranking all candidates approved, or all candidates disapproved. |
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# By default, all ranked candidates are considered [[Approval voting|approved]]. If the voter doesn't approve of some of the ranked candidates, an [[Approval Cutoff|approval cutoff]] can be placed at some rank, indicating that all candidates at that rank and below are disapproved. |
# By default, all ranked candidates are considered [[Approval voting|approved]]. If the voter doesn't approve of some of the ranked candidates, an [[Approval Cutoff|approval cutoff]] can be placed at some rank, indicating that all candidates at that rank and below are disapproved. |
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# Ballots are tabulated into a pairwise array containing results for each head-to-head contest (see [[Definite_Majority_Choice#Tallying_Votes|example]] below). Total approval rating for each candidate is also tabulated. |
# Ballots are tabulated into a pairwise array containing results for each head-to-head contest (see [[Definite_Majority_Choice#Tallying_Votes|example]] below). Total approval rating for each candidate is also tabulated. |
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== Background == |
== Background == |
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The name "DMC" was first suggested [http://lists.electorama.com/pipermail/election-methods-electorama.com/2005-March/015164.html here]. Equivlalent methods have been suggested several times on the EM mailing list: |
The name "DMC" was first suggested [http://lists.electorama.com/pipermail/election-methods-electorama.com/2005-March/015164.html here]. Equivlalent methods have been suggested several times on the EM mailing list: |
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* The [[Pairwise Sorted Approval]] equivalent was first proposed by Forest Simmons in |
* The [[Pairwise Sorted Approval]] equivalent was first proposed by Forest Simmons in [http://lists.electorama.com/pipermail/election-methods-electorama.com/2001-March/005448.html March 2001]. |
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* The Ranked Approval Voting equivalent was first proposed by Kevin Venzke in [http://lists.electorama.com/pipermail/election-methods-electorama.com/2003-September/010799.html September 2003]. The name was suggested by Russ Paielli in 2005. |
* The Ranked Approval Voting equivalent was first proposed by Kevin Venzke in [http://lists.electorama.com/pipermail/election-methods-electorama.com/2003-September/010799.html September 2003]. The name was suggested by Russ Paielli in 2005. |
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== See Also == |
== See Also == |
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*[[Proposed Statutory Rules for DMC]]: The rules for DMC in a form that would be suitable for adoption by a state legislature. |
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* [[Imagine Democratic Fair Choice]]: a method that picks its winner from the same P set as DMC. It currently uses a 'slate' ballot similar to the one suggested above. |
* [[Imagine Democratic Fair Choice]]: a method that picks its winner from the same P set as DMC. It currently uses a 'slate' ballot similar to the one suggested above. |
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* [[Pairwise Sorted Methods]] |
* [[Pairwise Sorted Methods]] |