Calculation capability in module "list" is limited to Sum. Calculation of other statistical data (e.g. Average) might be useful.
E.g. Average of sales qualification score
In the screenshot you can find an example. MEDDIC Score is our sales qualification method to qualify opportunities. For managers it is interesting to understand grouped average metrics. In ER it creates only a sum. It would be nice to change how this group value is calculated under the filter (e.g. sum, average, ...)