Like said in another forum post, a large challenge that all project managers face is communication. It sounds simple, but all projects, especially larger ones rely on so many people to complete their responsibilities on time because someone else is depending on it to continue their progress. Therefore, everyone on all levels of the team is required to be in communication with each other and with the PM. Additionally, the PM is the person largely responsible for the planning of the project timeline, budget, and team members themselves. As talked about in other forums, the planning of the timeline, is a very important and difficult task that can make or break the progress of the overall project. For thee most part, the success or failure of a project lies on the shoulders of the PM, and his/her ability to select the proper team, plan a timeline, and maintain communication between the entire team.