Project teams usually consist of employees from different departments of a company. In addition to their work in the project team, those team members often have different supervisors in their departments, they are involved in different workflows outside of the project and they have different approaches to get their work done. That can lead to problems in the project group quite quickly. As a project manager, you are responsible for the results of the project, but you lack the authority to give directives. The following principles help you to manage projects successfully.