Open a project exclusively when it is important that you are the only person updating the project's data at that time. For example, a project manager will open a project exclusively when creating a baseline for the project; running services, such as scheduling, leveling, summarizing, applying actuals, and storing period performance; reviewing team member status updates; or running reports against one or more projects.
You can open a project exclusively in P6 or P6 Professional. Users can view a project that is opened exclusively, but cannot update the project data until the exclusive lock is released from the project.
P6 Team Member interface users will see their assigned activities, but will not be allowed to update their activities until the exclusive lock is released from the project.