The value of this book lies in two major aspects. Cooper is a world expert at the product development process, and focuses on the elements needed to make that process successful (rather than just explicating the steps). He does this by pointing our the critical sucess factors. Six of these focus on the process elements that are necessary, and seven more focus on critical elements for execution. However, just as important, Cooper makes use of his vast background in consulting and his knowledge of the workings of many companies, and fills the book with commentary on the usage and limitations of the process, using examples from real companies, and "Key Points for Management. He is one of the few consultants who has developed a process who also teaches the reader how to make it valuable to his own needs.