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SPC – Statistical Process Control - Tadeusz Sałaciński - pdf, ebook – Ibuk.pl

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TABLE OF CONTENTS

PREFACE ... 7

SYMBOLS ... 8

1. SPC IN QUALITY ENGINEERING ... 9

2. ELEMENTS OF PROBABILITY CALCULUS AND MATHEMATICAL STATISTICS USED IN STATISTICAL PROCESS CONTROL ... 16

2.1. Introduction to mathematical statistics ... 16

2.2. Defi nitions of basic concepts of probability calculus and mathematical statistics used in statistical process control ... 17

2.3. Data presentation in SPC ... 25

2.4. Trust ranges of statistical parameters ... 27

2.5. Distributions of random variables ... 29

2.5.1. Characteristic of random variables ... 29

2.5.2. Distributions of discrete random variable ... 30

2.5.3. Distributions of continuous random variable ... 32

2.6. Random variable normality testing ... 35

3. PRODUCTION PROCESS STABILITY AND CAPABILITY ANALYSIS ... 36

3.1. Introduction to SPC ... 36

3.2. Requirements for production processes from quality point of view ... 39

3.3. Process regulation with control charts ... 40

3.3.1. Construction basics and types of control charts ... 40

3.3.2. Classic control charts ... 49

3.3.3. Sequential charts ... 60

3.3.4. Adaptative charts ... 68

3.3.5. Multidimensional T

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Hotelling chart ... 68

3.3.6. Charts for non-normal distributions ... 72

3.4. Process capability ... 73

3.5. Production process stability and capability analysis ... 86

4. MEASUREMENT SYSTEMS STABILITY AND CAPABILITY ANALYSIS FOR SPC USE ... 95

4.1. Requirements for measurement tools and systems ... 95

4.1.1. Resolution ... 95

4.1.2. Uncertainty ... 96

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4.1.3. Accuracy ... 97

4.1.4. Repeatability ... 97

4.1.5. Reproducibility ... 98

4.1.6. Stability ... 99

4.1.7. Linearity ... 99

4.2. Methodology of stability and capability analysis for measurement systems ... 100

4.3. Measurement uncertainty ... 100

4.3.1. Uncertainty and measurement error ... 100

4.3.2. Estimation of uncertainty of geometrical characteristics ... 105

4.3.3. Measurement uncertainty and tolerance range ... 110

4.4. Procedure 1 of measurement system valuation ... 112

4.5. Procedure 2 of measurement system validation (R&R method) ... 117

4.6. Procedure 3 of measurement system validation ... 124

5. SIX SIGMA METHODOLOGY ... 129

6. SPC IN COMPUTER AIDED QUALITY MANAGEMENT (CAQ) ... 139

7. SPC SUPPORTING TOOLS AND TECHNIQUES ... 143

7.1. Problem analysis tools in quality engineering ... 143

7.2. Ishikawa diagram ... 144

7.3. Pareto diagram ... 146

7.4. Flow chart ... 148

VOCABULARY ... 150

REFERENCES ... 154

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