Design of Experiments is probably the single most important process improvement tool available. Most engineers think they understand experimental methods, and most six sigma black belts believe they understand process improvement, but without a thorough understanding of DOE, their skills are a mirage. First, DOE is a complicated method, built on many statistical foundations. Don't think you can get by with just a cursory view of the subject, and trying to understand the concepts without the proper statistical background will be difficult, although some calculus in shown, it definitely is not needed. That said, everything you need to know is in this book. The examples are simple, the calculations are easy to follow and manually repeat, and they progressively take you to more difficult concepts. The text is very well written, but this is one of those subjects which requires you to read and re-read concepts to get a full understanding. I also recommend the solutions manual with does an excellent job of showing additional examples, but you will need Minitab or Design Expert to fully appreciate them (manual calculations quickly become impossible). If you have heard about DOE and just want an overview, just do a search on-line. If you are charged with any aspect of process improvement, study this book! If you are a grad student, and this is a required text, make sure to work the examples and end of chapter problems. The concepts, after a little effort, are actually easy to understand, but they support and build on each other. If you put in the effort, this could be the most practical and valuable course you have ever taken.