Field help (DISPLAYPJM) 

Select this check box to highlight material requirements tasks where a source document, for example, a purchase order or work order, has fulfilled the material requirement and the task is completed (task Status= Completed).

 By default, alerts (highlights) on quantities or delays on material requirements tasks are only displayed for open entities. You could, however, use this check box for analysis purposes to review alerts for closed tasks.

This check box is only available if the Products check box (and the Tasks check box) is selected.