Manually scheduling a Change
You can manually schedule a Change in the Graphical Scheduling application. Most often, you manually schedule a Change after the CPM has failed to find a scheduling solution automatically. To manually schedule a Change, you schedule tasks individually, and you can manually schedule a task that has been added to a Change. There are several ways in which you can perform manual scheduling.
About this task
As you begin the task of manually rescheduling a task, note that the Gantt chart is non-shaded if there are no blocking constraints, but the task is too long to fix in that space. The Gantt chart displays green for the task if there is enough time without resource constraints to fix the current task length.