A check box can be added to fields for an NE or tile. For instance, if an NE requires reports from six sources, you could include in its fields area a separate check field for each report, and then tick each report when it is submitted In this way you can track at a click which reports have been submitted and which remain outstanding.
Each of the fields, including the check field, is intended to allow on-the-fly documentation and editing. Thus, a tick mark can be added to or removed from the check field directly in the fields area.