Page 16 - Design for Six Sigma a Roadmap for Product Development

xiv Preface

S-curve analysis of the technical system is an important part of TRIZ
(Theory of Inventive Problem Solving), but it was not covered in the first
edition. We added this in Chapter 9.
Design of experiment (DOE) is an important tool in DFSS. However,
in many practical situations, we may not be able to complete all the
experimental runs because of cost, schedule, lack of prior knowledge, and
many other reasons. This will result in incomplete DOE. Incomplete
DOE happens everywhere, but there are very few publications that
teach people how to deal with it. The second edition has a very detailed
description about how to analyze incomplete DOE in Chapter 12.
Robust design is a very important methodology in DFSS. In the first
edition, we covered many effective robust design methods, such as static
and dynamic Taguchi methods, and several tolerance design methods.
In the second edition, we added substantial material in the area of
computer-aided robust design, in which computer-assisted parameter
and tolerance design are discussed, and a practical case study is
described in great detail. These additions are found in Chapter 16.
Mixture experiment is a special kind of response surface method that
can be used to deal with optimal design of mixtures and recipes.The mix-
ture experiment can be a very effective DFSS tool if we are dealing with
some design problems in the chemical, medical, and pharmaceutical
industries. In the second edition, various topics on mixture experimen-
tal design and analysis are extensively discussed in Chapter 17.
Validation is always an important step in DFSS. In the first edition
we discussed many issues regarding design and process validation. In
the second edition, we added materials regarding the validation of the
measurement equipment and systems in Chapter 18.
In summary, the second edition of this book includes many major
additions covering a variety of important subjects.We believe the second
edition will bring more value to our readers.