I'm relatively new to ops dashboard but one thing that has quickly hit me is its limitations.
Correct me if I'm wrong but it looks like you need to have your data already pre-processed in order for dashbosard to provide some useful stats. There is no % aggregator, I have to use a pie chart to get a %. If I do a custom query on a feature class and determine there are 101 records out of my 103 I have no way out putting out this % to the dashboard.
If i have a days calculated field in the data I can't turn that into a years figure unless I go back and calculate it in my feature class.
This is what I have found out so far, please correct me if i have wrong or missing something. This looks a bit like a teaser product at the moment.