The Practical Application of the Process Capability Study: Evolving From Product Control to Process Control

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ISBN: 9781439847787 | 1439847789
Cover: Nonspecific Binding
Copyright: 1/28/2011

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Using real-world examples in the context of the shop floor, this book addresses statistical process control through a non-mathematical, step-by-step explanation of the process capability study. It enables manufacturing personnel to understand how to recover a significant return on their investment from statistical process control. Machine operators and supervisors will better understand how they can communicate their process knowledge to management. Managers will then better understand the limitations of the process as it exists and will have a simple tool for managing process improvement.

Introduction	p. ix
Review of Basic Concepts	p. 1
Variation and Specifications	p. 1
Product Control versus Process Control	p. 2
Benefits of Process Capability Studies	p. 5
Topics Covered Going Forward	p. 6
Short Course in Variation	p. 7
Stability and Normal Variation	p. 7
Stability	p. 7
Normal	p. 8
Normal Variation	p. 8
Control Chart	p. 9
Instability	p. 12
Capability	p. 13
Ford's Contribution	p. 14
Ford's Supplier Base Reaction	p. 16
Ford's Reasoning	p. 17
Six Sigma	p. 19
Performing a Variable Process Capability Study	p. 23
Introduction	p. 23
Capability Index (Cpk) versus Capability Ratio (CR)	p. 27
Using Process Capability Studies to Solve Shop Floor Problems	p. 30
Shop Floor Interface	p. 31
Qualify the Measurement Process	p. 33
Qualify the Equipment and Raw Material	p. 34
Performing an Attribute Process Capability Study	p. 43
Introduction	p. 43
Bead Box Effect	p. 44
Percent Defective (P) Chart	p. 45
Acceptable Quality Level	p. 47
After the Process Capability Study Is Completed	p. 55
Meaningful Attribute Capability Concept	p. 56
Addressing Instability and Incapability	p. 59
Introduction	p. 59
Instability	p. 60
Process Checklist	p. 62
Problem with Random Equipment Adjustments	p. 62
Interaction	p. 64
Need for Science	p. 72
Analysis of Variance (ANOVA)	p. 73
Incapability	p. 76
Calculated versus Estimated Standard Deviation	p. 77
Another Simple Designed Experiment	p. 80
Understanding the Measurement Process	p. 83
Overview	p. 83
Five Elements of the Measurement Process	p. 84
People	p. 84
Measurement Devices	p. 85
Measured Product	p. 85
Measurement Procedure	p. 85
Local Environment	p. 85
Four Concerns of a Measurement Process Analysis	p. 86
Accuracy	p. 86
Precision/Repeatability	p. 87
Reproducibility	p. 88
Discrimination	p. 88
Destruct Measurement Process	p. 100
Destruct Measurement Process Analysis (MPA) Sample Selection	p. 101
Destruct MPA Control Chart Analysis	p. 101
Preparation of the ôSame Samplesö	p. 102
Measurement Process Analysis (MPA) Addendum	p. 111
Introduction	p. 111
Measurement Process Analysis (MPA) and Return on Investment	p. 111
MPA Results as a Training Tool	p. 112
MPA as a Measurement Device Purchasing Tool	p. 115
Measurement Equipment Terminology	p. 116
Measurement Variation and Specification	p. 117
Automated Measurement and Feedback Systems	p. 119
Why the Huge Difference?	p. 119
Creating Process Control Charts	p. 123
Overview	p. 123
Process Capability Studies beyond the Shop Floor	p. 131
Introduction	p. 131
Research and Development	p. 131
Sales and Marketing	p. 133
Purchasing	p. 133
Shop Floor Practices	p. 134
In Conclusion	p. 135
Appendix	p. 137
Glossary	p. 141
Index	p. 145
Table of Contents provided by Ingram. All Rights Reserved.

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The Practical Application of the Process Capability Study: Evolving From Product Control to Process Control

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