Data quality issues can have impacts across the business from finance and operations to sales and marketing. In the case of the latter, poor data quality can significantly impact the effectiveness of activities to acquire and retain customers, from campaign targeting, through lead qualification to opportunity conversion. Quantifying these issues and highlighting how they can be used to justify investment in data quality, this presentation to the joint BCS/DAMA June 2010 meeting seeks to bring to live the importance of data quality at the commercial end of the business.