Often, we make changes to the RPD,ETL, Schema etc and it is important to ensure that the dashboards do not regress because of these changes. This deck explains how you do regression testing using BI Validator
BI Validator: Regression Testing of Oracle Business Intelligence Dashboards from Product Marketing @ datagaps
Useful Links:
BI Validator Home Page : http://www.datagaps.com/bi-testing-tools/bi-validator