Book excerpt: Real executives talk about how Six Sigma changed their organizations for the better Backed by the real-world experience of executives who successfully implemented Six Sigma, this book shows how this powerful, data-driven quality improvement methodology can improve the learning cycle and financial and corporate reporting, as well as strategic planning, customer demand issues, and more. Case studies and interviews provide real-life best practices that make the implementation process that much easier for managers. The authors are Six Sigma experts affiliated with PricewaterhouseCoopers and here present an innovative examination of this powerful and popular methodology.