Hans Mulder suggests that roles of each member must be known to each other. Each team member must understand his or her role on the team. The project manager needs to have the ability to assign resources based on descriptions of roles. Each task in the project plan should have an assigned owner. Create an organizational chart depicting both the chain of command and a high-level view of roles. Everyone on the team should understand the "big picture" and their role in the big picture. Clearly defining roles will help prevent duplication of effort, as well as keep items from slipping through the cracks because of unclear ownership.
Improve your influence! Learn how to mentor and support your project executive sponsors & owners. Come learn with us because good sponsors make good projects, http://www.standishgroup.com/events