Table of Contents
Part 1 Overview
Chapter 1 General Six Sigma 3
Introduction 3
The History of Six Sigma 4
The Six Sigma Goal 5
Management's Role 5
Six Sigma Titles 5
Six Sigma Teams 6
Chapter 2 Measurements and Problem Solving 7
Metrics and Keeping Score 7
The DMAIC Problem-Solving Method 8
Part 2 Nonstatistical Six Sigma Tools
Chapter 3 Customer-Driven Needs and Concerns 15
The Simplified QFD 15
Traditional QFDs 21
The Simplified FMEA 23
Traditional FMEAs 28
Chapter 4 Visual Assists 31
Fishbone Diagrams 31
Instructions for Fishbone Diagrams 32
Simplified Process Flow Diagrams 34
Instructions for Simplified Process Flow Diagrams 37
Visual Correlation Tests 40
Part 3 Getting Good Data
Chapter 5 Data and Samples 49
Types of Data 49
Data Discrimination 50
Collecting Samples 53
Average and Variation 58
Chapter 6 Simplified Gauge Verification 71
Checking for Gauge Error 73
Instructions for Simplified Gauge Verification 74
Example of Simplified Gauge Verification on Bearings 76
Gauge R&R 78
Part 4 Probability, Plots, and Statistical Tests
Chapter 7 Data Overview 83
Probability 83
Data Plots and Distributions 92
Plotting Data 108
Chapter 8 Testing for Statistically Significant Change 115
Testing for Statistically Significant Change Using Variables Data 115
Using a Sample to Check for a Change versus a Population 124
Checking for a Statistically Significant Change between Two Samples 133
Incidental Statistics Terminology Not Used in Preceding Tests 139
Testing for Statistically Significant Change Using Proportional Data 140
Testing for Statistically Significant Change, Nonnormal Distributions 150
Part 5 Process Control, Does, and Rss Tolerances
Chapter 9 General and Focused Control 157
General Process Control 157
Traditional Control Charts 158
Simplified Control Charts 158
Chapter 10 Design of Experiments and Tolerance Analysis 163
Design of Experiments 163
Simplified DOEs 164
RSS Tolerances 165
Appendix: The Six Sigma Statistical Tool Finder Matrix 167
Glossary 169
Related Reading 173
Index 175