As a decision comes into focus, the team must take into account that some members may not agree and find it difficult to express their disagreement. While seeking a consensus, everyone has veto power, provided they express conditions under which they would accept the proposal. Teams should always seek the BEST answer, whether it is by a consensus or by another means. Occasionally, the consensus may in fact be to let a vote decide an issue. Decisions may also be deferred to an individual or group most proficient in an area being questioned.
Teams have many ways to make decisions, with the best way depending on the situation.
It is always best to agree HOW to decide first, and then stick with the chosen process. I'm a big proponent of using flip charts during meetings. They are easy to use, and visual aids help sharpen your team's focus and encourage member participation. When all members are visually focused on the same content, their thinking is targeted and the words or graphics draw everyone into the process and energize them to stay on task. Effective public speakers use visual aids for the same reasons.