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Statistical Methods for Quality Improvement, Third Edition by THOMAS P. RYAN

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Preface to the Second Edition

There have been many developments in statistical process control (SPC) during the past ten years, and many of those developments have been incorporated into this edition.

In particular, major changes were made to the chapters on process capability and multivariate control charts as much material has been added with the result that these chapters are now considerably longer.

Chapter 10 has also been considerably expanded and now includes sections on short-run control charts, pre-control, autocorrelated data, nonparametric control charts, and various other topics that were not covered in the first edition.

Chapter 13 on the design of experiments is noticeably longer, in part because of the addition of material on robust design considerations. Chapter 14 on Taguchi methods and alternatives while retaining the material from the first edition now includes considerable discussion and illustration of combined arrays and product arrays.

Chapter 17 is a new chapter on using SPC tools together as is done in Six Sigma programs. These programs are also discussed in the chapter.

Other significant additions include material on probability-type limits for attribute charts and cause-selecting (regression-type) control charts.

In addition to new material, retained material from the first edition has been extensively reorganized. In particular, cumulative sum (CUSUM) and exponentially weighted moving average (EWMA) methods are now in a separate chapter, and are covered ...

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