Kim Kanaga & Michael Kossler 
Do You Really Need a Team? [PDF ebook] 

Teams are expensive and time consuming to launch, and leading a team is a full-time job. Teams can do a great job of addressing complex problems and issues that affect many parts of the organization and its people. But for decisions that must be reached quickly, or when a diversity of perspectives is not needed, smaller and more easily managed work units are a better choice. Before launching a team, analyze the task at hand to make sure that a team is really what you need to get the job done.