During the project life cycle, a project team will go through several stages of team development. As the project life cycle progresses, the level of conflict generally decreases in intensity. In some cases the conflict intensity resulting from personality clashes can increase significantly to the point where it becomes a sensitive issue. Likewise, issues such as cost changes, schedule changes, or failure to deliver qualified resources when promised can also cause increased levels of conflict as the project progresses. The project manager must address these challenges through leadership and facilitation. Considering the progressive changes in the relationship of team members, name the five stages of team development as described in the Tuckman model and explain how conflict intensity changes in each phase.