Change Durations on a Gantt Chart

If you have project modification rights, you can change the durations of WBS elements directly on the Gantt chart.

This option is available only if the Resource Planning module is activated.

To change WBS element durations on the Gantt chart:

  1. In the Navigation pane, select Hubs > Projects > Plan.
  2. On the Schedule tab of the Plan form, select the project for which you want to view the Gantt chart.
  3. Expand the structure to display the plan rows for which you want to change duration dates or click Expand/Collapse All to show all levels of the structure.
  4. Turn on Show Critical Path if you want to see which WBS levels cannot be delayed with affecting the completion date of the project.
    The WBS expands to also show all those levels on the critical path in addition to what was already expanded. Items that are on the critical path display as red bars.
  5. On the Actions bar, click Check Out.
    If someone else checks in the plan while you are moving the Gantt bars, you are notified that the plan has been checked in and your changes will not take effect.
  6. If necessary, expand the structure to display the plan rows for which you want to change duration dates.
  7. Move the cursor over the left or right end of the Gantt bar until the cursor changes to the horizontal arrow.
  8. Left-click the Gantt bar, drag the end of the bar right or left on the chart, and release the mouse button.

    As you drag the Gantt bar, the new dates display in the tool tip and Vantagepoint also updates the Plan Start or Plan End dates and Duration values on the left grid.

    If Show Critical Path is turned on, as you drag bars on the Gantt chart, any elements that cannot slip any further without impacting the end date will turn red and become part of the critical path. If you move or resize Gantt bars that cause hidden WBS levels to be on the critical path, Vantagepoint does not automatically show them. Toggle Show Critical Path off and on to make them reappear.

    If there are no planned hours for the element or its children, a completion message displays at the top of the page when you release the mouse button and the process is complete. If the Gantt bar element has any dependencies, those dates also change to reflect the new plan dates that are enforced through the dependency. For example:
    • Task A has a Finish-to-Start (FS) relationship with Task B. Task A also has a Finish-to-Finish (FF) relationship with Task C. If you extend Task A's end date to 4 days further in the future, then Task B is updated to start 4 days later and Task C is updated to end 4 days later.

    If there are planned hours for the element or its children, the Reschedule Plan Dates dialog box displays when you release the mouse button.

  9. If there are planned hours associated with the plan element or any children, select how the hours should be handled on the Reschedule Plan Dates dialog box:
    • To redistribute the planned hours evenly for any assignments for the plan element for which the assignment dates must change to fall within the new plan date range, select Redistribute Hours Evenly on Changed Assignments.
    • To keep the current distribution of planned hours, select Don't Redistribute.

      Note that if any of the planned hours extended beyond the new duration dates, this selection is prohibited. You must either change the new dates or elect to redistribute the hours.

    If you also select Replace All Child Dates with New Parent Dates, the plan dates or assignment dates for all the child rows are adjusted to match the new plan dates.
  10. Click Reschedule to apply the changes.

    When the process finishes, a completion message displays at the top of the page.

    After verifying the validity of all changes, Vantagepoint does the following:
    • Changes the affected plan dates or assignment dates.
    • Redistributes planned hours and amounts. If hours are moved to a date range in which the resource already has planned hours, the rescheduled hours are distributed proportionally across that date range based on the distribution of the preexisting planned hours.
    • Updates the values displayed in all planning grids to reflect the new schedule.