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spc (version 0.2.1)

Statistical Process Control

Description

Evaluation of control charts by means of the zero-state, steady-state ARL (Average Run Length). Setting up control charts for given in-control ARL and plotting of the related figures. The control charts under consideration are one- and two-sided EWMA and CUSUM charts for monitoring the mean of normally distributed independent data. Now, the ARL calculation of EWMA-S^2 control charts is added. Other charts and parameters are in preparation. Further SPC areas will be covered as well (sampling plans, capability indices ...).

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Version

Install

install.packages('spc')

Monthly Downloads

696

Version

0.2.1

License

GPL

Maintainer

Sven Knoth

Last Published

September 24th, 2025

Functions in spc (0.2.1)

xewma.arl

Compute ARLs of EWMA control charts
tol.lim.fac

Two-sided tolerance limit factors
sewma.arl

Compute ARLs of EWMA control charts (variance charts)
xewma.crit

Compute critical values of EWMA control charts
xcusum.ad

Compute steady-state ARLs of CUSUM control charts
xcusum.crit

Compute decision intervals of CUSUM control charts
xcusum.arl

Compute ARLs of CUSUM control charts
sewma.crit

Compute critical values of EWMA control charts (variance charts)
xewma.ad

Compute steady-state ARLs of EWMA control charts