The Schulze method (/ˈʃʊltsə/) is a single winner ranked-choice rule developed by Markus Schulze that selects a using ranked ballots. It is also known as the beatpath method or Schwartz sequential dropping (SSD). The Schulze method is a Condorcet method, which means if there is a candidate who is preferred by a majority over every other candidate in pairwise comparisons, then this candidate will be the winner when the Schulze method is applied.
For proportional representation, a single transferable vote (STV) variant known as Schulze STV also exists. The Schulze method is used by several organizations including Wikimedia, Debian, Ubuntu, Gentoo, Pirate Party political parties and many others.
The Schulzemethod (/ˈʃʊltsə/) is a single winner ranked-choice rule developed by Markus Schulze that selects a using ranked ballots. It is also known...
It was invented by Markus Schulze, who developed the Schulzemethod for resolving ties using a Condorcet method. Schulze STV is similar to CPO-STV in...
ranked pairs method – including the Schulzemethod, Schulze STV, and split cycle method – are Condorcet-consistent methods of medium computational complexity...
Choice and Welfare. doi:10.1007/s00355-011-0598-2. Schulze, Markus (2024-03-03). "The SchulzeMethod of Voting". p. 351. arXiv:1804.02973 [cs.GT]. The...
candidates, Minimax Condorcet and its variants (including Ranked Pairs and Schulze'smethod) satisfy the participation criterion. However, with more than 3 candidates...
Schulze is a German surname, from the medieval office of Schulze, or village official. Notable people with the surname include: Andrew Schulze (1896–1982)...
In ancient Athenian democracy, sortition was the traditional and primary method for appointing political officials, and its use was regarded as a principal...
routing, the widest path problem is also an important component of the Schulzemethod for deciding the winner of a multiway election, and has been applied...
averages methods (also known as divisor methods). When using the Hare quota (described below), the method is known as the Hare–Niemeyer method, Hamilton's...
generally does not satisfy the Condorcet criterion, Condorcet method variants like Schulze STV and CPO-STV do. Critics[who?] contend that some voters find...
of voters. However, both groups combined elect B as the Schulze winner. Thus, the Schulzemethod fails the consistency criterion. Balinski, Michel; Laraki...
parliament or boards of directors. The study of formally defined electoral methods is called social choice theory or voting theory, and this study can take...
ISSN 1432-217X. S2CID 122758840. Schulze, Markus (October 2003). "A New Monotonic and Clone-Independent Single-Winner Election Method". Voting matters (www.votingmatters...
replacing his Borda count method with one similar to Copeland's method, then in 1876 proposed a hybrid of the two in "A method of taking votes on more than...
criterion. The Schulzemethod, ranked pairs, instant-runoff voting, Nanson's method, and Bucklin voting pass this criterion. Plurality, Black's method, and minimax...
lower ratings. Tie votes in STAR Voting are rare, but as with any voting method they can occur, especially in elections without many voters. In most cases...
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