To obtain numeric values that should be displayed within a dashboard item, Dashboard calculates a summary function against the specified measure.
To see the list of available summary functions, go to Summary Function Types.
Note that the summary type cannot be changed in OLAP mode.
Changing Summary Type
By default, Dashboard calculates Sum for numeric measures and Count for measures that contain another type of data.
You can change the summary function type for numeric measures. To do this, invoke the dashboard item Binding menu and select the required data item. In the drop-down Summary Type list, select the desired summary type.