"An excellent book for any practicing engineers who are interested in using Taguchi's approach in optimizing and characterizing a process. Dr. Roy's step-by-step method outlined in the book does not require the readers to have any prior statistical knowledge to understand Taguchi's approach to Design of Experiments. The book also walks you through the computer program on the CD-ROM that comes with it." - Marcus Khoo, Quality Manager, Agilent Technologies, Inc."Per student evaluations (including my own!), Ranjit Roy is one of the best instructors that anyone is likely to meet. This is especially remarkable considering that Dr. Roy specializes in a very difficult subject: making Design of Experiments (DoE) easy to understand and accessible to everyone. His software, Qualitek 4, based upon his experience in doing real experiments and teaching other engineers to do experiments, established the benchmark in how to make this type of software useful and user friendly. While traditional classes in designed experiments spend considerable time teaching engineers how to do the mathematical analysis of these studies (yawn), Ranjit likes to teach engineers how to do experiments using software that automatically designs the experiment, analyzes the data, and prints reports (with graphics) that can immediately be shared in management or team meetings. Now Ranjit has taken about fifteen years of experience in teaching these types of classes, and has made it available to everyone in a recent book published by John Wiley & Sons, Wiley-Interscience Professional/Trade Division.This book is written for people who want to learn a method for designing and analyzing simple experiments with the goal of helping the reader apply these techniques in their own work environment. I believe this book will be particularly helpful to engineers (Black Belts or Green Belts) trying to learn the technique of designed experiments as taught in the Six Sigma process. This book is a "must have" for anyon