This volume is designed to equip engineers with the statistical methods required for the implementation of modern quality assurance. It stresses the use of personal computers by the engineers themselves. Numerous examples throughout the text illustrate the methodology and are reinforced by exercises at the ends of the chapters. The examples are drawn from varied areas of application, including chemical engineering and semi- conductor. The usefulness of graphic representation of data is emphasized, and there is specific, practical advice on accomplishing this with the practitioner's personal computer. Examples of such graphs are given throughout the book.