The goal of this book remains the same as for the first edition, namely, to provide you with the comprehensive guidance and direction necessary to realize Six Sigma’s promise, while avoiding traps and pitfalls commonly encountered. In this book you will find a complete overview of the management and organization of Six Sigma, the philosophy which underlies Six Sigma, and those problem solving techniques and statistical tools most often used in Six Sigma. It is not intended to be an ASQ certification study guide, although it includes coverage of most of the topics included in the ASQ body of knowledge. Rather it is intended as a guide for champions, leaders, ‘‘belts,’’ team members and others interested in using the Six Sigma approach to make their organizations more efficient, more effective, or both. In short, it is a user’s manual, not a classroom textbook.