text: Decision-making systems Voters seek one outcome: a government majority who will vote in favor of a decision or a prioritization that the voter cares about. Voters and/or elected representatives may seek in several way to identify what the majority opinion is. Three types include the simple, weighted, or consociational majority vote. Other multi-option procedures include two-round voting, the alternative vote (AV) - also known as instant run-off voting (IRV) - and the single transferable vote (STV), approval voting, the Borda Count (BC), the Modified Borda Count (MBC), and the Condorcet method, nearly all of which are also used as electoral systems. They are outlined below.
  Electoral systems
  There are many electoral methods.  The purpose of an election may be to choose one person, such as a president, or a group, such as a committee or a parliament.  In electing a parliament, either each of many small constituencies can elect a single representative, as in Britain; or each of a lesser number of multi-member constituencies may elect two or more representatives, as in Ireland; or multi-member districts and some single-member districts can be used; or the entire country can be treated as one "at-large" district, as in The Netherlands.
  Different voting systems use different ballot designs. Some ballots allow only one choice to be selected (single X voting); others allow ranking or selecting multiple options (Ranked ballots).