Reliability Improvement with Design of Experiment

Lloyd Condra

• Publisher: CRC Press
• Year: 2018
• Print ISBN: 9780824705275
• eBook ISBN: 9781351990912
• Topic: Technology & Engineering
• Subtopic: Probability & Statistics
• Index: Technology & Engineering

A guide to implementing and operating a practical reliability program using carefully designed experiments to provide information quickly, efficiently and cost effectively. It emphasizes real world solutions to daily problems. The second edition contains a special expanded section demonstrating how to combine accelerated testing with design of experiments for immediate improvement.

Contents

About the Series

Preface

PART I. INTRODUCTION

1. Faster . . . Better . . . Cheaper . . .

2. Quality and reliability

3. Design of experiments

PART II. DESIGN OF EXPERIMENTS

4. Introduction to Design of Experiments

5. Conducting a main effects experiment

6. Dealing with interactions

7. Designing an experiment

8. Analyzing DoE Results

9. DoE in product design

10. Managing the uncontrollable factors

11. Application of doe to reliability assurance

PART III. RELIABILITY ENGINEERING

12. Reliability Measurement

13. Graphical Reliability Methods

14. Reliability Calculations: Constant Failure Rate

15. Reliability Calculations: Various Failure Rate

16. System Reliability Methods

PART IV. ACCELERATED TESTING

17. Accelerated Testing

18. Environmental and Operating Stresses

19. Interpreting Data from Accelerated Tests

20. Developing an Integrated Reliability Test Program

PART V. USING DESIGN OF EXPERIMENTS TO INTEGRATE RELIABILITY INTO THE ORGANIZATION

21. Reliability Improvement with Design of Experiments

22. Using Design of Experiments to Integrate Reliability into the Organization

Glossary

APPENDIXES

A. Taguchi Orthogonal Arrays and Linear Graphs

B. Values of the F-Distribution

C. Median, 5%, and 95% Rank Tables

D. Critical Values of the Chi-Squared Distribution

Index

About the Series

The genesis of modern methods of quality and reliability can be found in a sample memo dated May 16, 1924, in which Walter A. Shewhart proposed the control chart for the analysis of inspection data. This led to a broadening of the concept of inspection from emphasis on detection and correction of defective material to control of quality through analysis and prevention of quality problems. Subsequent concern for product performance in the hands of the user stimulated development of the systems and techniques of reliability. Emphasis on the consumer as the ultimate judge of quality serves as the catalyst to bring about the integration of the methodology of quality with that of reliability. Thus, the innovations that came out of the control chart spawned a philosophy of control of quality and reliability that has come to include not only the methodology of the statistical sciences and engineering, but also the use of appropriate management methods together with various motivational procedures in a concerted effort dedicated to quality improvement.

This series is intended to provide a vehicle to foster interaction of the elements of the modem approach to quality, including statistical applications, quality and reliability engineering, management, and motivational aspects. It is a forum in which the subject matter of these various areas can be brought together to allow for effective integration of appropriate techniques. This will promote the true benefit of each, which can be achieved only through their interaction. In this sense, the whole of quality and reliability is greater than the sum of its parts, as each element augments the others.

The contributors to this series have been encouraged to discuss fundamental concepts as well as methodology, technology, and procedures at the leading edge of the discipline. Thus, new concepts are placed in proper perspective in these evolving disciplines. The series is intended for those in manufacturing, engineering, and marketing and management, as well as the consuming public, all of whom have an interest and stake in the products and services that are the lifeblood of the economic system.

The modem approach to quality and reliability concerns excellence: excellence when the product is designed, excellence when the product is made, excellence as the product is used, and excellence throughout its lifetime. But excellence does not result without effort, and products and services of superior quality and reliability require an appropriate combination of statistical, engineering, management, and motivational effort. This effort can be directed for maximum benefit only in light of timely knowledge of approaches and methods that have been developed and are available in these areas of expertise. Within the volumes of this series, the reader will find the means to create, control, correct, and improve quality and reliability in ways that are cost effective, that enhance productivity, and that create a motivational atmosphere that is harmonious and constructive. It is dedicated to that end and to the readers whose study of quality and reliability will lead to greater understanding of their products, their processes, their workplaces, and themselves.

Edward G. Schilling

Preface

It was not an easy decision for me to write a second edition of this book. I had a number of conflicting emotions. On one hand, the subject matter of a book such as this one changes constantly, and I felt the need to update it to reflect the changes. On the other hand, I was not sure that this was the best time to update it. I wanted to correct the inevitable mistakes that seem to show up after the book goes to press, but there were relatively few such mistakes, and they were so obvious that I was pretty sure they wouldn’t cause problems to the readers. I was also concerned about the amount of work required to write the second edition. In the end, I decided to do it. (And, yes, it was more work than I anticipated.)

I was gratified by the reception of the first edition, and I probably learned more from it than the readers did. I learned how to organize my thoughts and communicate them to a wide audience. I learned that reviewers can be kind and understanding when they encounter mistakes. I learned that readers, including authors of similar books, can be quite helpful in pointing out areas where improve...

Table of contents

• Cover
• Halftitle Page
• Title Page
• Copyright
• Table of Contents