Most display options provide additional types of statistical information on student progress in the right-hand part of the display. Their significance varies according to the display option, and is indicated in the column headings. One or more fields may be blank if the information gathered for that student is not sufficient at a particular time. It is also possible to choose "Time to Completion"; this indicates the estimated time necessary for individual students to complete the course goals based on average progress for the period chosen. Where the Intermediate Objectives are in use, this also shows "Time to Current Objective" (See Sec. 7.22).