This book is useful only to complete newcomers to data warehousing, particularly managers, although I consider Rob Mattison's or Vidette Poe's books to be better for the latter group. There is little substantive for the hands-on practitioner who has to build a real data warehouse. In fact, this book has very little to say about data warehouses at all - most of the book is generic project management stuff. If you need hard-core information about the design of a real data warehouse, try Ralph Kimball's or Erik Thomsen's books