There may be some tasks in your hierarchy that depend on others, for instance some tasks cannot start until some others have finished. Now you can add in these dependencies for your tasks. See this section for more information on dependencies.
Adding dependencies will alter the schedule.
At this stage, the schedule should look somewhat like the final result you desire. However, there may be some aspects that you wish to modify. If you wish to force the schedule dates of a particular task to a particular value, or to a particuar range of values, you may add the appropriate constraint to the task. See Constraints for more information on constraints.
Constraints can be added by double-clicking on the cell in the Constraint column.
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