A method on a computer for providing critical chain-based project management is disclosed. The method includes receiving at least one project plan for a project comprising a plurality of tasks and calculating a task priority for each of the plurality of tasks based on the at least one project plan. The method further includes receiving at least one sub-task for a first task of the plurality of tasks and assigning the at least one sub-task a task priority identical to the task priority of the first task. In one alternative, the method further includes receiving a new task priority for the first task, assigning the new task priority to the first task and assigning the new task priority to the at least one sub-task of the first task. The method may also include an interface to allow starting of sub-tasks only when the parent task is started.