Common group decision making models include voting and non-voting models: Consultation with a single decision maker - The decision group is consulted for information and advice but one person consolidates and makes the final choice. Group averaging - The decision is derived from some form of averaging of independent individual selections. Voting - A selection is made based on achieving an agreed portion of votes from the group. Multiple rules exist that include majority, super majority (60%, two-thirds), or highest number of votes (winner takes all), and often rules can consider establishing minimum participation for validity. Consensus - A majority agrees and no one objects. Unanimous - All must agree