Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Best Practitioners Reference to QFD I've found

I found the Cohen book to be the reference to Quality Function Deployment that I have been looking for. Unlike many of the Japanese books on the subject that have been translated to english, Cohen's book provides a comprehensive look at the subject of QFD, from the history of QFD through the final chapters that guide one through the mechanics of conducting a QFD study. I particularly like the no-nonsense writing style and the step-by-step approach taken to explain the method without going into tediously technical details about all the potential mathematics involved. This is the first book that I have found on the subject of QFD that I could actually USE to complete a QFD study. I also found that the method described is not dependent on any specific QFD software, but works with any of the 3 QFD software packages that I use. If you have to have just one reference for Quality Function Deployment, this is the book I would choose.