Team - Team Size, Composition, and Formation

Team Size, Composition, and Formation

Team size and composition affect the team processes and outcomes. The optimal size (and composition) of teams is debated and will vary depending on the task at hand. At least one study of problem-solving in groups showed an optimal size of groups at four members. Other works estimate the optimal size between 5-12 members. Belbin did extensive research on teams prior to 1990 in the UK that clearly demonstrated that the optimum team size is 8 roles plus a specialist as needed. Fewer than 5 members results in decreased perspectives and diminished creativity. Membership in excess of 12 results in increased conflict and greater potential of sub-groups forming.

David Cooperrider suggests that the larger the group, the better. This is because a larger group is able to address concerns of the whole system. So while a large team may be ineffective at performing a given task, Cooperider says that the relevance of that task should be considered, because determining whether the team is effective first requires identifying what needs to be accomplished.

Regarding composition, all teams will have an element of homogeneity and heterogeneity. The more homogeneous the group, the more cohesive it will be. The more heterogeneous the group, the greater the differences in perspective and increased potential for creativity, but also the greater potential for conflict.

Team members normally have different roles, like team leader and agents. Large teams can divide into sub-teams according to need.

Many teams go through a life-cycle of stages, identified by Bruce Tuckman as: forming, storming, norming, performing and adjourning.