Data quality is a continuous problem in the data warehouse industry. The cost of poor data quality has been reckoned in terms of lost productivity, lost opportunities, inefficiencies, reduced profitability and lost customer confidence. These are the same problems addressed by W. Edwards Deming. Deming helped manufacturers achieve world-class excellence by addressing the Quality Problem. Deming codified his principles into “14 Points.” Points 3 and 5 are the focus of this two-part series.