Understanding Statistical Process Control |
Other editions - View all
Common terms and phrases
adjustment area of opportunity assignable causes AVER(X average and range average chart average count average range calculated Cause-and-Effect Diagram CAVITY central line conceptual population conforming product consistent control charts control limits cost-of-use dispersion Empirical Rule EXAMPLE EXERCISE grand average histogram hypothetical process individual values kurtosis lack of control mean square deviation median range moving range natural process limits nominal aim nonconforming product normally distributed np-chart obtained operation Pareto chart percent percentage nonconforming population standard deviation problem process aim process average process standard deviation range chart represented revised control root mean square run test running record sample average sample median sample range sample standard deviation sample statistics sampling frame SD(X SETTING THE PROCESS Shewhart shown in Figure skewness special causes specification limits specified tolerance stable process statistical control statistical inference statistical process control steps subgroup averages subgroup ranges thickness TOKAI RIKA CHART UCLR uncontrolled variation z-score