Once the field is defined, it is necessary to map the data item to be displayed for that field. The data item is mapped to the field by selecting the "Save and Add Data Item" action on the Add Summary View Field. Select the data item, and select save.
Values stored in the data items are displayed as they are stored in the screen. E.g. All Boolean values will display as true or false, if a different display is required (pass or fail instead) it is necessary to override the value by assigning the corresponding data items manually in the rules.