Data quality is an intricate way of measuring data properties from different perspectives. It is a comprehensive examination of the application efficiency, reliability and fitness of data, especially data residing in a data warehouse. Inside an organization, adequate data quality is vital for transactional and operational processes, as well as the longevity of business intelligence (BI) and business analytics (BA) reporting. Data quality may be affected by the way in which data is entered, handled and maintained. Data quality assurance (DQA) is a procedure intended to verify the efficiency and reliability of data.