The second edition of this book aims to provide a "tool kit" to supplement good quality management systems and teamwork in the search for customer satisfaction. It sets down some basic principles of quality to provide a platform for improvement and describes the techniques used in process quality control. It is not written for the professional statistician or mathematician, and attempts have been made to eliminate mathematical jargon. The book is written to meet the requirements of students in universities, polytechnics, and colleges engaged in courses on science, technology, engineering, and management subjects, including quality assurance.