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Industrial Statistics: Practical Methods and Guidance for Improved Performance

ISBN: 978-0-470-58412-5
256 pages
April 2010
Industrial Statistics: Practical Methods and Guidance for Improved Performance (0470584122) cover image
HELPS YOU FULLY LEVERAGE STATISTICAL METHODS TO IMPROVE INDUSTRIAL PERFORMANCE

Industrial Statistics guides you through ten practical statistical methods that have broad applications in many different industries for enhancing research, product design, process design, validation, manufacturing, and continuous improvement. As you progress through the book, you'll discover some valuable methods that are currently underutilized in industry as well as other methods that are often not used correctly.

With twenty-five years of teaching and consulting experience, author Anand Joglekar has helped a diverse group of companies reduce costs, accelerate product development, and improve operations through the effective implementation of statistical methods. Based on his experience working with both clients and students, Dr. Joglekar focuses on real-world problem-solving. For each statistical method, the book:

  • Presents the most important underlying concepts clearly and succinctly

  • Minimizes mathematical details that can be delegated to a computer

  • Illustrates applications with numerous practical examples

  • Offers a "Questions to Ask" section at the end of each chapter to assist you with implementation

The last chapter consists of 100 practical questions followed by their answers. If you're already familiar with statistical methods, you may want to take the test first to determine which methods to focus on.

By helping readers fully leverage statistical methods to improve industrial performance, this book becomes an ideal reference and self-study guide for scientists, engineers, managers and other technical professionals across a wide range of industries. In addition, its clear explanations and examples make it highly suited as a textbook for undergraduate and graduate courses in statistics.

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PREFACE.

1. BASIC STATISTICS: HOW TO REDUCE FINANCIAL RISK?

1.1. Capital Market Returns.

1.2. Sample Statistics.

1.3. Population Parameters.

1.4. Confidence Intervals and Sample Sizes.

1.5. Correlation.

1.6. Portfolio Optimization.

1.7. Questions to Ask.

2. WHY NOT TO DO THE USUAL t-TEST AND WHAT TO REPLACE IT WITH?

2.1. What is a t-Test and what is Wrong with It?

2.2. Confidence Interval is Better Than a t-Test.

2.3. How Much Data to Collect?

2.4. Reducing Sample Size.

2.5. Paired Comparison.

2.6. Comparing Two Standard Deviations.

2.7. Recommended Design and Analysis Procedure.

2.8. Questions to Ask.

3. DESIGN OF EXPERIMENTS: IS IT NOT GOING TO COST TOO MUCH AND TAKE TOO LONG?

3.1. Why Design Experiments?

3.2. Factorial Designs.

3.3. Success Factors.

3.4. Fractional Factorial Designs.

3.5. Plackett–Burman Designs.

3.6. Applications.

3.7. Optimization Designs.

3.8. Questions to Ask.

4. WHAT IS THE KEY TO DESIGNING ROBUST PRODUCTS AND PROCESSES?

4.1. The Key to Robustness.

4.2. Robust Design Method.

4.3. Signal-to-Noise Ratios.

4.4. Achieving Additivity.

4.5. Alternate Analysis Procedure.

4.6. Implications for R&D.

4.7. Questions to Ask.

5. SETTING SPECIFICATIONS: ARBITRARY OR IS THERE A METHOD TO IT?

5.1. Understanding Specifications.

5.2. Empirical Approach.

5.3. Functional Approach.

5.4. Minimum Life Cycle Cost Approach.

5.5. Questions to Ask.

6. HOW TO DESIGN PRACTICAL ACCEPTANCE SAMPLING PLANS AND PROCESS VALIDATION STUDIES?

6.1. Single-Sample Attribute Plans.

6.2. Selecting AQL and RQL.

6.3. Other Acceptance Sampling Plans.

6.4. Designing Validation Studies.

6.5. Questions to Ask.

7. MANAGING AND IMPROVING PROCESSES: HOW TO USE AN AT-A-GLANCE-DISPLAY?

7.1. Statistical Logic of Control Limits.

7.2. Selecting Subgroup Size.

7.3. Selecting Sampling Interval.

7.4. Out-of-Control Rules.

7.5. Process Capability and Performance Indices.

7.6. At-A-Glance-Display.

7.7. Questions to Ask.

8. HOW TO FIND CAUSES OF VARIATION BY JUST LOOKING SYSTEMATICALLY?

8.1. Manufacturing Application.

8.2. Variance Components Analysis.

8.3. Planning for Quality Improvement.

8.4. Structured Studies.

8.5. Questions to Ask.

9. IS MY MEASUREMENT SYSTEM ACCEPTABLE AND HOW TO DESIGN, VALIDATE, AND IMPROVE IT?

9.1. Acceptance Criteria.

9.2. Designing Cost-Effective Sampling Schemes.

9.3. Designing a Robust Measurement System.

9.4. Measurement System Validation.

9.5. Repeatability and Reproducibility (R&R) Study.

9.6. Questions to Ask.

10. HOW TO USE THEORY EFFECTIVELY?

10.1. Empirical Models.

10.2. Mechanistic Models.

10.3. Mechanistic Model for Coat Weight CV.

10.4. Questions to Ask.

11. QUESTIONS AND ANSWERS.

11.1. Questions.

11.2. Answers.

APPENDIX: TABLES.

REFERENCES.

INDEX.

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ANAND M. JOGLEKAR, PhD, is a leading statistics educator and consultant. In 1990, Dr. Joglekar founded Joglekar Associates, a firm dedicated to helping industrial organizations reach their goals through the effective implementation of statistical methods. He has taught statistical methods to thousands of industry participants through in-house seminars and seminars sponsored by associations such as the LifeScience Alley®, Institute of Food Technologists, and American Association of Cereal Chemists. Among his many publications, Dr. Joglekar is the author of Statistical Methods for Six Sigma in R&D and Manufacturing (also from Wiley).
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"This is one of the few statistic books that is "user friendly" and enjoyable to read. That is because each chapter is clearly and concisely written. But what really makes this book more valuable than others of this type are the very practical applications and the memorable "stories". These are human-interest stories that illustrate how time and money is saved when statistics is used properly and how large sums can be wasted when used improperly, such as the t-test example that is provided.... This book could save an industrial department considerable time and money. It would help readers design experiments more effectively and efficiently, solve problems and make difficult decisions based on limited data. Those with a very limited budget can learn how to design their experiments to maximize the information and correlations. The actual problems that it will help readers solve are limitless, but include finding the best formulation; conducting a proper design of experiments, so that resources are efficiently used; using data to solve a problem to determine why a product is suddenly out of specification; what are the best process conditions to optimize yield without sacrificing quality, etc. The book ends with useful questions and answers that assist in testing the reader's knowledge and finding which parts of the book require his or her focus."
Lothar W. Kleiner, Ph.D.
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