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Statistical Process Control

Statistical methods for quality control and production process monitoring

Statistical process control (SPC) refers to a number of different methods for monitoring and assessing the quality of manufactured goods. Combined with methods from the design of experiments, SPC is used in programs that define, measure, analyze, improve, and control development and production processes. These programs are often implemented using “Design for Six Sigma” methodologies.


capabilityProcess capability indices
capaplotProcess capability plot
controlchartShewhart control charts
controlrulesWestern Electric and Nelson control rules
gagerrGage repeatability and reproducibility study
histfitHistogram with a distribution fit
normspecNormal density plot shading between specifications