Statistical control by monitoring and adjustment
著者
書誌事項
Statistical control by monitoring and adjustment
（Wiley series in probability and mathematical statistics）
John Wiley & Sons, c2009
2nd ed
- : pbk
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注記
"SPC EPC synergistic control."--Cover
Includes bibliographical references (p. 307-320) and index
内容説明・目次
内容説明
Praise for the First Edition
"This book . . . is a significant addition to the literature on statistical practice . . . should be of considerable interest to those interested in these topics."
-International Journal of Forecasting
Recent research has shown that monitoring techniques alone are inadequate for modern Statistical Process Control (SPC), and there exists a need for these techniques to be augmented by methods that indicate when occasional process adjustment is necessary. Statistical Control by Monitoring and Adjustment, Second Edition presents the relationship among these concepts and elementary ideas from Engineering Process Control (EPC), demonstrating how the powerful synergistic association between SPC and EPC can solve numerous problems that are frequently encountered in process monitoring and adjustment.
The book begins with a discussion of SPC as it was originally conceived by Dr. Walter A. Shewhart and Dr. W. Edwards Deming. Subsequent chapters outline the basics of the new integration of SPC and EPC, which is not available in other related books. Thorough coverage of time series analysis for forecasting, process dynamics, and non-stationary models is also provided, and these sections have been carefully written so as to require only an elementary understanding of mathematics. Extensive graphical explanations and computational tables accompany the numerous examples that are provided throughout each chapter, and a helpful selection of problems and solutions further facilitates understanding.
Statistical Control by Monitoring and Adjustment, Second Edition is an excellent book for courses on applied statistics and industrial engineering at the upper-undergraduate and graduate levels. It also serves as a valuable reference for statisticians and quality control practitioners working in industry.
目次
Preface xi
1 Introduction and Revision of Some Statistical Ideas 1
1.1 Necessity for Process Control 1
1.2 SPC and EPC 1
1.3 Process Monitoring Without a Model 3
1.4 Detecting a Signal in Noise 4
1.5 Measurement Data 4
1.6 Two Important Characteristics of a Probability Distribution 5
1.7 Normal Distribution 6
1.8 Normal Distribution Defined by and 6
1.9 Probabilities Associated with Normal Distribution 7
1.10 Estimating Mean and Standard Deviation from Data 8
1.11 Combining Estimates of 2 9
1.12 Data on Frequencies (Events): Poisson Distribution 10
1.13 Normal Approximation to Poisson Distribution 12
1.14 Data on Proportion Defective: Binomial Distribution 12
1.15 Normal Approximation to Binomial Distribution 14
Appendix 1A: Central Limit Effect 15
Problems 17
2 Standard Control Charts Under Ideal Conditions As a First Approximation 21
2.1 Control Charts for Process Monitoring 21
2.2 Control Chart for Measurement (Variables) Data 22
2.3 Shewhart Charts for Sample Average and Range 24
2.4 Shewhart Chart for Sample Range 26
2.5 Process Monitoring With Control Charts for Frequencies 29
2.6 Data on Frequencies (Counts): Poisson Distribution 30
2.7 Common Causes and Special Causes 34
2.8 For What Kinds of Data Has the c Chart Been Used? 36
2.9 Quality Control Charts for Proportions: p Chart 37
2.10 EWMA Chart 40
2.11 Process Monitoring Using Cumulative Sums 46
2.12 Specification Limits, Target Accuracy, and Process Capability 53
2.13 How Successful Process Monitoring can Improve Quality 56
Problems 57
3 What Can Go Wrong and What Can We Do About It? 61
3.1 Introduction 61
3.2 Measurement Charts 64
3.3 Need for Time Series Models 65
3.4 Types of Variation 65
3.5 Nonstationary Noise 66
3.6 Values for constants 71
3.7 Frequencies and Proportions 74
3.8 Illustration 76
3.9 Robustness of EWMA 78
Appendix 3A: Alternative Forms of Relationships for EWMAs 79
Questions 79
4 Introduction to Forecasting and Process Dynamics 81
4.1 Forecasting with an EWMA 81
4.2 Forecasting Sales of Dingles 82
4.3 Pete's Rule 85
4.4 Effect of Changing Discount Factor 86
4.5 Estimating Best Discount Factor 87
4.6 Standard Deviation of Forecast Errors and Probability Limits for Forecasts 88
4.7 What to Do If You Do Not Have Enough Data to Estimate 89
4.8 Introduction to Process Dynamics and Transfer Function 89
4.9 Dynamic Systems and Transfer Funtions 90
4.10 Difference Equations to Represent Dynamic Relations 90
4.11 Representing Dynamics of Industrial Process 96
4.12 Transfer Function Models Using Difference Equations 97
4.13 Stable and Unstable Systems 98
Problems 100
5 Nonstationary Time Series Models for Process Disturbances 103
5.1 Reprise 103
5.2 Stationary Time Series Model in Which Successive Values are Correlated 104
5.3 Major Effects of Statistical Dependence: Illustration 105
5.4 Random Walk 106
5.5 How to Test a Forecasting Method 107
5.6 Qualification of EWMA as a Forecast 107
5.7 Understanding Time Series Behavior with Variogram 110
5.8 Sticky Innovation Generating Model for Nonstationary Noise 113
5.9 Robustness of EWMA for Signal Extraction 118
5.10 Signal Extraction for Disturbance Model Due to Barnard 118
Questions 122
Problems 122
6 Repeated-Feedback Adjustment 125
6.1 Introduction to Discrete-Feedback Control 125
6.2 Inadequacy of NIID Models and Other Stationary Models for Control: Reiteration 125
6.3 Three Approaches to Repeated-Feedback Adjustment that Lead to Identical Conclusions 126
6.4 Some History 130
6.5 Adjustment Chart 132
6.6 Insensitivity to Choice of G 134
6.7 Compromise Value for G 135
6.8 Using Smaller Value of G to Reduce Adjustment Variance 2x 136
Appendix 6A: Robustness of Integral Control 137
Appendix 6B: Effect on Adjustment of Choosing G Different from 0: Obtaining Equation (6.12) 139
Appendix 6C: Average Reduction in Mean-Square Error Due to Adjustment for Observations Generated by IMA Model 140
Questions 140
Problems 140
7 Periodic Adjustment 143
7.1 Introduction 143
7.2 Periodic Adjustment 143
7.3 Starting Scheme for Periodic Adjustment 146
7.4 Numerical Calculations for Bounded Adjustment 146
7.5 Simple Device for Facilitating Bounded Adjustment 150
7.6 Bounded Adjustment Seen as Process of Tracking 153
7.7 Combination of Adjustment and Monitoring 153
7.8 Bounded Adjustment for Series not Generated by IMA Model 155
Problems 160
8 Control of Process with Inertia 163
8.1 Adjustment Depending on Last Two Output Errors 163
8.2 Minimum Mean-Square Error Control of Process With First-Order Dynamics 167
8.3 Schemes with Constrained Adjustment 169
8.4 PI Schemes with Constrained Adjustment 170
8.5 Optimal and Near-Optimal Constrained PI Schemes: Choice of P 171
8.6 Choice of G For P = 0 and P = 0.25 172
8.7 PI Schemes for Process With Dead Time 178
8.8 Process Monitoring and Process Adjustment 181
8.9 Feedback Adjustment Applied to Process in Perfect State of Control 182
8.10 Using Shewhart Chart to Adjust Unstable Process 182
8.11 Feedforward Control 183
Appendix 8A: Equivalence of Equations for PI Control 184
Appendix 8B: Effect of Errors in Adjustment 184
Appendix 8C: Choices for G and P to Attain Optimal Constrained PI Control for Various Values of 0 and 0 with d0 = 0 and d0 = 1 185
Questions 191
Problems 191
9 Explicit Consideration of Monetary Cost 193
9.1 Introduction 193
9.2 How Often Should You Take Data? 197
9.3 Choosing Adjustment Schemes Directly in Terms of Costs 203
Appendix 9A: Functions h(L/ a) and q(L/ a) in Table 9.1 205
Appendix 9B: Calculation of Minimum-Cost Schemes 205
Problems 207
10 Cuscore Charts: Looking for Signals in Noise 209
10.1 Introduction 209
10.2 How Are Cuscore Statistics Obtained? 216
10.3 Efficient Monitoring Charts 219
10.4 Useful Method for Obtaining Detector When Looking for Signal in Noise Not Necessarily White Noise 221
10.5 Looking for Single Spike 223
10.6 Some Time Series Examples 224
Appendix 10A: Likelihood, Fisher's Efficient Score, and Cuscore Statistics 227
Appendix 10B: Useful Procedure for Obtaining Appropriate Cuscore Statistic 230
Appendix 10C: Detector Series for IMA Model 231
Problems 231
11 Monitoring an Operating Feedback System 235
11.1 Looking for Spike in Disturbance zt Subjected to Integral Control 235
11.2 Looking for Exponential Signal in Disturbance Subject to Integral Control 237
11.3 Monitoring Process with Inertia Represented by First-Order Dynamics 238
11.4 Reconstructing Disturbance Pattern 240
Appendix 11A: Derivation of Equation (11.3) 240
Appendix 11B: Derivation of Equation (11.10) 242
Appendix 11C: Derivation of Equation (11.14) 243
12 Brief Review of Time Series Analysis 245
12.1 Serial Dependence: Autocorrelation Function and Variogram 245
12.2 Relation of Autocorrelation Function and Variogram 246
12.3 Some Time Series Models 247
12.4 Stationary Models 247
12.5 Autoregressive Moving-Average Models 250
12.6 Nonstationary Models 253
12.7 IMA [or ARIMA(0, 1, 1)] Model 253
12.8 Modeling Time Series Data 255
12.9 Model Identification, Model Fitting, and Diagnostic Checking 256
12.10 Forecasting 261
12.11 Estimation with Closed-Loop Data 266
12.12 Conclusion 269
Appendix 12A: Other Tools for Identification of Time Series Models 269
Appendix 12B: Estimation of Time Series Parameters 270
Solutions to Exercises and Problems 273
References and Further Reading 307
Appendix Three Time Series 321
Index 327
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