After opening the challenge in group you can see in the overview screen the doughnut pie chart, hover on a color to see how many members are in this category. Below the overview is the list of members and their current challenge status. See whether a challenge has been achieved by a participant (green) or not (red).
If the ‘proficiency’ report is chosen via the group report download screen, then this report will have a column that contains the challenge status per drill or download the group challenge evaluation report.
Click group reports to read about the different reports available.