I would like to have a dashboard widget that shows me the average on-time completion percentage for a given team's actions over a specific time period.

For example, over the past 90 days, Team A's average on-time completion percentage was 87%.

Due Date Completion is a filter option for specific widgets, but it needs to be added as a "Value" so the whole widget can be built off of it. I can create widgets that will pull the number of tasks that were completed on time, but there isn't a way to quickly see the overall percentage of on-time completion.