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Design of Experiments for Engineers and Scientists
 
 

Design of Experiments for Engineers and Scientists, 1st Edition

 
Design of Experiments for Engineers and Scientists, 1st Edition,Jiju Antony,ISBN9780750647090
 
 
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Elsevier

9780750647090 New edition

9780080469959

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The Design of Experiments (DOE) guide for quality engineering - essential reading for Six Sigma professionals

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Key Features

* Provides essential DOE techniques for process improvement initiatives
* Introduces simple graphical techniques as an alternative to advanced statistical methods - reducing time taken to design and conduct tests
* Case studies place DOE techniques in the context of different industry sectors

Description

The tools and technique used in the Design of Experiments (DOE) have been proved successful in meeting the challenge of continuous improvement over the last 15 years. However, research has shown that applications of these techniques in small and medium-sized manufacturing companies are limited due to a lack of statistical knowledge required for their effective implementation. Although many books have been written in this subject, they are mainly by statisticians, for statisticians and not appropriate for engineers.

Design of Experiments for Engineers and Scientists overcomes the problem of statistics by taking a unique approach using graphical tools. The same outcomes and conclusions are reached as by those using statistical methods and readers will find the concepts in this book both familiar and easy to understand. The book treats Planning, Communication, Engineering, Teamwork and Statistical Skills in separate chapters and then combines these skills through the use of many industrial case studies. Design of Experiments forms part of the suite of tools used in Six Sigma.

Key features:
* Provides essential DOE techniques for process improvement initiatives
* Introduces simple graphical techniques as an alternative to advanced statistical methods – reducing time taken to design and develop prototypes, reducing time to reach the market
* Case studies place DOE techniques in the context of different industry sectors
* An excellent resource for the Six Sigma training program

This book will be useful to engineers and scientists from all disciplines tackling all kinds of manufacturing, product and process quality problems and will be an ideal resource for students of this topic.

Dr Jiju Anthony is Senior Teaching Fellow at the International Manufacturing Unit at Warwick University. He is also a trainer and consultant in DOE and has worked as such for a number of companies including Motorola, Vickers, Procter and Gamble, Nokia, Bosch and a large number of SMEs.

Readership

Manufacturing engineers, project engineers, quality engineers, quality managers, production engineers and students.

Jiju Antony

Dr Jiju Antony is Professor of Quality Management and Deputy Director of the Institute of Operations management with the University of Strathclyde. He is also a trainer and consultant in DOE and has worked as such for a number of companies including Motorola, Vickers, Procter and Gamble, Nokia, Bosch and a large number of SMEs.

Affiliations and Expertise

Professor of Quality Management and Deputy Director of the Institute of Operations management with the University of Strathclyde

Design of Experiments for Engineers and Scientists, 1st Edition

Preface.
Acknowledgements.

INTRODUCTION TO INDUSTRIAL EXPERIMENTATION
Introduction.
Some fundamental and practical issues in industrial experimentation.
Summary.
Exercises.
References.

FUNDAMENTALS OF DESIGN OF EXPERIMENTS:
Introduction.
Basic principles of Design of Experiments:
Randomization.
Replication.
Blocking.
Degrees of freedom.
Confounding.
Design resolution.
Metrology considerations for industrial designed experiments:
Measurement system capability.
Some tips for the development of a measurement system.
Selection of quality characteristics for industrial experiments.
Exercises.
References.

UNDERSTANDING KEY INTERACTIONS IN PROCESSES:
Introduction.
Alternative method for calculating the two order interaction effect.
Synergistic interaction vs antagonistic interaction.
Scenario 1.
Scenario 2.
Summary.
Exercises.
References.

A SYSTEMATIC METHODOLOGY FOR DESIGN OF EXPERIMENTS:
Introduction.
Barriers in the successful application of DOE.
A practical methodology for DOE:
Planning phase.
Designing phase.
Conducting phase.
Analysing phase.
Analytical tools of DOE:
Main effects plot.
Interactions plots.
Cube plots.
Pareto plot of factor effects.
Normal Probability Plot of factor effects.
Normal Probability Plot of residuals.
Response surface plots and regression models.
Model building for predicting response function.
Confidence interval for the mean response.
Summary.
Exercises.
References.

SCREENING DESIGNS:
Introduction.
Geometric and non-geometric P-B designs.
Summary.
Exercises.
References.

FULL FACTORIAL DESIGNS:
Introduction.
Example of a 2 squared full factorial design:
Objective 1: Determination of main/interaction effects which influence mean plating thickness.
Objective 2: Determination of main/interaction effects which influence variability in plating thickness.
Objective 4: How to achieve a target plating thickness of 120 units?
Example of a 2 to the power of 3 full factorial design:
Objective 1: To identify the significant main/interaction effects which affect the process yield.
Objective 2: To identify the significant main/interaction effects which affect the variability in process yield.
Objective 3: What is the optimal process condition?
Example of a 2 to the power of 4 full factorial design:
Objective 1: Which of the main/interaction effects affect mean crack length?
Objective 2: Which of the main/interaction effects affect variability in crack length?
Objective 3: What is the optimal process condition to minimize mean crack length?
Summary.
Exercises.
References.

FRACTIONAL FACTORIAL DESIGNS:
Introduction.
Construction of half-fractional factorial designs.
Example of a 2 to the power of (7-4) factorial design.
An application of 2-level fractional factorial design.
Example of a 2 to the power of (5-1) factorial design:
Objective 1: To identify the factors which influence the mean free height.
Objective 2: To identify the factors which affect variability in the free height of leaf springs.
How do we select the optimal factor settings to minimize variability in free height?
Summary.
Exercises.
References.

SOME USEFUL AND PRACTICAL TIPS FOR MAKING YOUR EXPERIMENTS SUCCESSFUL:
Introduction:
Get a clear understanding of a problem.
Project selection.
Conduct exhaustive and detailed brainstorming session.
Teamwork and selection of a team foe experimentation.
Select the continuous measurable quality characteristics or responses for the experiment.
Choice of an appropriate Experimental Design.
Iterative experimentation.
Randomize the experimental trial order.
Replicate to dampen the effect of noise or uncontrolled variation.
Improve the efficiency of experimentation using blocking strategy.
Understanding the confounding pattern of factor effects.
Perform confirmatory runs/experiments.
Summary.
Exercises.
References.

CASE STUDIES:
Introduction.
Case studies:
Optimization of a radiographic quality welding of cast iron.
Reducing process variability using Experimental Design technique objective of the experiment.
Slashing scrap rate using fractional experiments.
Optimizing the time of flight of a paper helicopter.
Optimizing a wire bonding process using Design of Experiments.
Training for Design of Experiments using a catapult.
Optimization of core tube life using designed experiments.
Optimization of a spot welding process using Design of Experiments.
Summary.
References.

Index.

Quotes and reviews

"This is a book outlining a method of designing experiments highly suitable for those in the Manufacturing field for whom it is written...Jiju puts forward an excellent method, Design of Experiments (DOE), to show how improvements can be brought about. While the subject matter is not new...the exclusive focus he gives to manufacturing problems and the wider insights into human considerations if the theory is to be brought to successful practice are admirable. The book is well structured to prepare the reader, to explain to the reader and then confirm the reader with sets of exercises.

- Tribology International, Volume 37, Issue 9
 
 
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