Since the invitation cards cannot be made until a guest list has been prepared, and the location decided, we would like to ensure that the subproject Make the invitation cards does not begin before both the other subprojects are finished.
This is done by defining dependencies between the subprojects.
To do this, adjust the Gantt chart so that the bars for all the subprojects are visible. You can drag the divider separating the Attribute table view from the Gantt chart to make the Gantt chart wider.
Now, with the mouse, drag the bar for Decide the guest list to the bar for Make the invitation cards and drop it there.
A window appears that displays a drop down list of different types of dependencies for selection and a Lag value.
Keep the default values and click the Add button. ( The default values are interpreted as saying that Make the invitation cards should not start until Decide the guest list is finished. ) A blue arrow also appears on the Gantt chart showing the dependency.
Similarly, make Make the invitation cards dependent on Decide the location. The projects are rescheduled and you can see that now, Make the invitation cards is scheduled after both Decide the location and Decide the guest list.
Another method of creating dependencies is by editing the Dependencies column (see Editing dependencies )