This document discusses team effectiveness and the factors that contribute to high-performing teams. It defines a team as having members who work jointly to maximize strengths and minimize weaknesses by complementing each other. For a team to be effective, it must have cohesion, confrontation, and collaboration. The document outlines when teamwork is required based on factors like the complexity of the task and environment. It presents a model of team effectiveness that includes elements of team design, processes, and environment. Finally, it lists characteristics of high-performing teams such as clear goals, competent members, collaboration, and principled leadership.