Project participants combine their efforts to reach the project goals. Implementing requirements and completing tasks is assigned to participants, and time is allocated for this work. The amount of work and its cost are calculated from the planned effort.
While tasks are being done, participants log effort, which makes plan-versus-actual analysis possible.
Project data (artifacts) is stored inside the project and, by default, only project participants can access it. The access level (view, modify, delete, and so on) is determined by the participant's role in the project and by the access rights configured for that role.