The Dependant Column Summary Definition screen allows you to specify how each dependant column of a calculated column is summarised when the calculation is evaluated on the summary data.

When you add a calculated column as a summary column in a dashboard object, you can specify that the calculation is evaluated on the summary data rather than the source data. In this scenario, each of the dependant columns are summarised for the group, and then the calculation is evaluated on the summary values. By default, the dependant columns will be summarised using the summary function specified for the calculated column in the data screen.

However, you may wish to specify a specific summary function for one or all of the dependant columns.

To specify a specific summary function for a dependant column, select the column, then select the summary type.