This book is about the modern practice of statistical quality control. It provides comprehensive coverage of the subject from basic principles to state-of-the-art concepts and applications. The objective is to give the reader a sound under- standing of the principles and the basis for applying those principles in a wide variety of both product and nonproduct situations. While statistical techniques are used throughout, the book has a strong engineering and management orientation. Extensive knowledge of statistics is not a necessary prerequisite for using this book. Readers whose background includes a basic course in statistical methods will find the book easily accessible.