Teams often fail due to a lack of proper planning at their formation, which leads to unclear goals and roles. They also fail when management does not fully support a team culture and does not provide adequate resources, clarity of roles and responsibilities, mutual accountability, or effective shared leadership. Additionally, teams can fail if they do not focus on creativity and excellence, are unable to effectively deal with conflicts, lack proper training, or are improperly used to solve problems that do not truly require a team approach.