CPO-STV, or the Comparison of Pairs of Outcomes by the Single Transferable Vote, is a ranked voting system designed to achieve proportional representation...

been declared elected. In proportional quota-rule systems such as STV and CPO-STV, these excess votes can be transferred to other candidates, preventing...

preference list." While STV generally does not satisfy the Condorcet criterion, Condorcet method variants like Schulze STV and CPO-STV do. Critics[who?] contend...

Schulze method for resolving ties using a Condorcet method. Schulze STV is similar to CPO-STV in that it compares possible winning candidate pairs and selects...

transferable vote (STV) system was adopted by Denmark in 1855. Ranked voting first saw governmental use in the 1890s in Tasmania, deploying the STV system. Its...

forms of ranked voting Single transferable vote Gregory Wright Schulze STV CPO-STV Ranked party list PR Spare vote Proportional forms of cardinal voting...

British colonies of Ireland, Australia, and New Zealand (which now use STV, IRV + STV, and MMP respectively). Some countries use FPTP alongside proportional...

are also several variants of single transferable vote, including CPO-STV, Schulze STV and the Wright system. Dual-member proportional representation is...

quota was used in the original proposal for a single transferable vote (STV-Hare) system, but has since been almost entirely supplanted for this use...

Schulze method Proportional forms which satisfy this property include: CPO-STV Schulze STV Though there will not always be a Condorcet winner or Condorcet loser...