I created a custom calculation in OAC – DV to get a count distinct for the number of task that each team member performed in a day. We were assigning a time loss for each time they had to switch a task in a day. We needed to sum the results of the calculation. DV calculates the count distinct at the summary level. This caused us to export to Excel to get the correct calculation. See attached PDF of results from DV vs Exporting to Excel.