## Understanding Statistical Process Control |

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### Contents

TWO APPROACHES TO VARIATION | 1 |

TOOLS FOR DESCRIBING VARIATION | 22 |

INTERPRETING DESCRIPTIVE STATISTICS | 41 |

Copyright | |

12 other sections not shown

### Other editions - View all

Understanding Statistical Process Control Donald J. Wheeler,David Smith Chambers No preview available - 2010 |

### Common terms and phrases

3-sigma limits adjustment area of opportunity assignable causes attribute data AVER(X average and range average chart average count average range batch calculated Cause-and-Effect Diagram central line conceptual population consistent control charts count data decision interval estimate EXAMPLE EXERCISE factors flowchart grand average histogram hypothetical process individual values inspection kurtosis lack of control mean square deviation measurements median range moving range natural process limits nominal aim nonconforming product np-chart obtained operation out-of-control parameters Pareto chart percent percentage nonconforming points Poisson distribution problem procedure process aim process average process standard deviation proportion nonconforming range chart represented revised control root mean square run test running record sample average sample median sample statistics SD(X Section SETTING THE PROCESS Shewhart shown in Figure skewness specification limits specified tolerance stable process statistical control statistical inference statistical process control steps subgroup averages subgroup median subgroup ranges techniques UCLR uncontrolled variation units upper control limit