Background Information
In the realm of little-used features in Microsoft Project, there are a couple of Project Options settings worth noting. These are the calculation options found on the Advanced page of the Project Options dialog.
To view these options, click the File tab and then click the Options tab in the Backstage. In the Project Options dialog, click the Advanced tab. Scroll down to the bottom of the Advanced page and examine the first four options in the Calculation options for this project section of the page, such as shown in Figure 1.

Figure 1: Options in the Calculation options section
The four options I want to discuss in this article are:
By default, the second and fourth options are disabled. When you select the checkbox for the first option in each pair, Microsoft Project activates the second option of the pair so that you can select it, if desired. Before you can use any of these four options, there are a couple of requirements that you must meet:

Figure 2: Status Date dialog

Figure 3: Tracking table
After setting the Status date for your project, and before you begin entering task progress, you are now ready to select one or more of the options in the Calculation options for this project section of the Advanced page in the Project Options dialog.
Understanding and Using the Calculation Options
The first two options apply to a task in which the progress is ahead of schedule, as of the Status date for the project. For example, if a task is 75% complete, but the expected percent complete would be 50% as of the Status date, then the task is ahead of schedule. Figure 4 shows a task that is ahead of schedule. The red dashed line, by the way, is the Status date for the project. You can easily tell that this task is ahead of schedule because the Gantt bar’s dark blue progress line extends to the right of the Status date line.

Figure 4: Task progress ahead of schedule
The last two options apply to a task that is behind schedule, as of the Status date for the project. For example, if a task is 25% complete, but the expected percent complete would be 50% as of the Status date, then the task is behind schedule. Figure 5 shows a task that is behind schedule. You can easily tell that this task is behind schedule because the Gantt bar’s dark blue progress line does not extend to the Status date line.

Figure 5: Task progress behind schedule
You can use these four options to enforce two scheduling best practices, which are:
In Figure 4 shown previously, the portion of the progress line that extends to the right of the Status date line is considered actual work in the future. In Figure 5 shown previously, the light blue Gantt bar portion between the end of the progress line and the Status date line represents incomplete work in the past.
To eliminate actual work in the future, select one or both of the first two options. Again, these options are:
Figure 6 shows the result when I selected only the first of these two options and then I entered a % Complete value of 75%. Notice that Microsoft Project moved the Gantt bar to the left so that the right edge of the progress line meets the Status date line. Notice also that the software created a task split and left the incomplete work scheduled in the future on its original dates.

Figure 6: Gantt bar moved to the left, creating a task split
Figure 7 shows the result when I also selected the second of these two options and then I entered a % Complete value of 75%. Notice that Microsoft Project moved the entire Gantt bar to the left so that the right edge of the progress line meets the Status date line and so that the incomplete work begins on the Status date.

Figure 7: Entire Gantt bar moved to the left
The last two options apply to a task in which the progress is behind schedule so that there is incomplete work in the past. Another scheduling best practice states that here shall be no incomplete work in the past (to the left of the Status date). To eliminate incomplete work in the past, select one or both of the following options:
Figure 6 shows the result when I selected only the first of these two options and then I entered a % Complete value of 25%. Notice that Microsoft Project created a task split and rescheduled the incomplete work from the past to start on Monday, September 21 (to the right of the Status date line).

Figure 8: Incomplete work rescheduled after the Status date
Figure 9 shows the result when I also selected the second of these two options and then I entered a % Complete value of 25%. Notice that Microsoft Project moved the entire Gantt bar to the right so that the right end of the progress line meets the Status date line.

Figure 9: Entire task moved to the right
If you re-examine Figure 6 through Figure 9, you will probably notice that Microsoft Project automatically adjusted the Start date and/or Finish date of the task, as needed. This is the consequence of selecting one or more of the options in the Calculation options for this project section of the Advanced page in the Project Options dialog. The benefit you gain from selecting these options is that your project schedule is now more accurate.