The document discusses teams and what makes an effective team. It defines a team as a group of interdependent people committed to a shared goal, with clear roles and accountability. Teams are important because tasks have become more complicated and require diverse expertise. The document then outlines Tuckman's model of team development, including the forming, storming, norming, and performing stages. It also lists six "sins" that can undermine team building and keys to building great teams, such as commitment, contribution, communication, and conflict management. Finally, it provides measures of highly effective teams, including being customer-focused, transparent, incubators of leaders, and value-adders.