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Date Constraints on the Gantt Chart

*This article covers Date Constraints on the Gantt Chart. If you are looking for information on Dependencies on the Gantt Chart, please visit this page.

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Overview

Date constraints signal the earliest date that a task can begin. Once a date constraint is in place, the task cannot be automatically rescheduled to a date prior to that indicated by this constraint. For example, if you create a finish to start dependency and then reschedule the first task to an earlier date, then:

  • if there is no date constraint, the dependent task is automatically rescheduled to begin immediately after the first task.
  • if there is a date constraint, the dependent task is rescheduled to begin as early as the date of the date constraint, but not before it.

On the Gantt Chart, date constraints appear as solid vertical lines at the beginning of a dependent task.

Important Information

  • If a task has a date constraint, and you delete the dependency, then the date constraint automatically reappears when you recreate the dependency.

Date Constraints on the Table

You can add, remove, and edit date constraints on the table portion of the Gantt Chart.

  1. Select a folder or a project from the left-hand navigation panel.
  2. Switch to the Gantt Chart.
  3. Click the gear icon on the table portion of Gantt Chart.
  4. Check the “Start Constraint” box in the pop-up that appears.
  5. Click anywhere outside the window to see the column in the table.
  6. Find the needed task and set the date constraint in the “Start Constraint” column.

Date Constraints on the Timeline

Adding a Date Constraint

  1. Select a Folder or Project from the Folder tree.
  2. Switch to the Gantt Chart.
  3. Create a dependency between tasks.
  4. Use drag and drop to reschedule the dependent task to a different start date.

A date constraint is automatically added to the dependent task.

Remove a Date Constraint

You can remove date constraints created on dependent tasks which are part of start to start or finish to start dependencies. To do this:

  1. Select a Folder or Project from the Workspace’s left-hand Navigation panel.
  2. Switch to the Gantt Chart.

From here you can:

  • Click on the task with the date constraint and use drag and drop to reschedule the task so that it begins immediately after (for finish to start) or on the same date as the preceding task (for start to start dependencies).
  • Extend the task’s duration so that it begins immediately after (for finish to start) or on the same date as the preceding task (for start to start).
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