Dr. Roy has been able to translate into everyday language some of the most difficult concepts of the Taguchi methodology. Whereas the book does not provide the reader with much theoretical background, it doeas provide ample examples and practical approaches to the methodology. Excellent sections are the discussions about the OAs and the modified arrays as well as the ANOVA. The references to the CD ROM are well placed.The shortcomings of the book are the very poor screens from the software package. In fact, in some cases they are unreadable. Another shortcoming is the absence of any discussion of tolerance design using the Taguchi methodology.Overall: a good book for reference.