Lesson 9.3. Updating Task Actual Values
Figure 9-4. The Update Tasks dialog box
Figure 9-5. The rescheduled project after adjusting a task's actual start date.
Some tasks in your project will not fall within their scheduled time frame; some tasks may end faster or slower than scheduled. In these instances, you should update what actually happens in the project. When actual values are entered, Project adjusts the other actual values for the task and recalculates the task's completion percentage. For example, if a task started later than scheduled, entering the actual start date will cause Project to reschedule the task based on the actual date.
Note: An actual duration is the amount of duration work already done, while a remaining duration is the amount of duration work left to do.