What are the main three reasons why project teams fail?

What will be an ideal response?

There are a number of reasons why teams operate at less than optimum performance. One of the most common causes of project team failure is due to the absence of clear and commonly understood project goals. Project teams also suffer if the team roles and interdependencies are poorly defined. A lack of motivation among team members also has a detrimental effect on project team performance. Poor communication comes about for a variety of reasons, but the net result is that project teams underperform if communication is poor. Lack of, or poor, leadership fails a team since the manager is often the lynchpin holding the team together. High turnover among project team members is disruptive as it prevents a manager from achieving team cohesion. Dysfunctional behavior refers to disruptive acts of some project team members; this behavior is also detrimental to team performance.