Steve, Jeffrey, and Andy are coauthors of The Big Book of Dashboards: Visualizing Your Data Using Real-World Business Scenarios. Steve Wexler has worked with ADP, Gallup, Deloitte, Convergys, and many other organizations to help them understand and visualize their data. Jeffrey A. Shaffer is vice president of information technology and analytics at Recovery Decision Science and Unifund. Andy Cotgreave is technical evangelist at Tableau Software. He has over 10 years' experience in data visualization and business intelligence, first honing his skills as an analyst at the University of Oxford.