If the out of the box reports do not meet your business requirements, you can configure custom reports to collect other information about your master data. For example, you might want to collect information about the number of closed tasks by priority.
To use custom reports, you must configure and register the reports, and then add data entries to the report. To associate drilldown reports to the report data, you configure and register the drilldown reports. Then you can associate the drilldown report to a data entry in the custom report.