Quality Assurance (QA) is a very important component of any data-centric application project.  Projects such as data warehouse, data migration, ETL, Data Lakes and MDM are no exception. The Majority of these projects are the multi-year and multi-million dollar in nature due to the amount of work and products required. Therefore it’s necessary to have proper planning for QA in place to avoid late discoveries of process and data errors.

While the methodologies of testing have evolved considerably over the years, the science of QA in data integration project has not. In this article, we’ll focus on some of the key challenges with data warehouse testing, data migration testing and ETL testing.