Read this section, which discusses both formal and informal group dynamics. Pay particular attention to the foundational model of team and group development. Several other team development models are available, but the Tuckman model is one of the most popular today. Punctuated equilibrium is a more radical approach to understanding groups and teams. This team-building model is based on the idea that teams go through periods of stability and periods of rapid change. What happens during these alternating periods is what makes this approach to managing teams so unique.