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ProcessCapabilityR: Classical and Generalized Process Capability Indices

Computes classical process capability indices (Cp, Cpk, Cpu, Cpl, Cpm, Cpmk, Pp, Ppk, Ppu, Ppl, Z) and the generalized process capability index Cpy (Maiti, Saha & Nanda, 2010) <doi:10.1080/16843703.2010.11673233> for any continuous or discrete quality characteristic. Users supply the probability density function (PDF) and cumulative distribution function (CDF) of the characteristic, and the package returns point estimates, bootstrap confidence intervals (percentile and BCa), and sensitivity tables/plots across ranges of short-term standard deviation (sigma), long-term standard deviation (s), desired yield (p0), and significance levels. Classical indices are recoverable as special cases under the normal distribution. The package follows the theory and notation of Kane (1986) <doi:10.1080/00224065.1986.11978984>, Chan, Cheng & Spiring (1988) <doi:10.1080/00224065.1988.11979102>, Pearn, Kotz & Johnson (1992) <doi:10.1080/00224065.1992.11979403>, Kotz & Johnson (2002) <doi:10.1080/00224065.2002.11980119>, Montgomery (2020, ISBN:978-1-119-39930-8), Juran (1974, ISBN:978-0-07-033176-1), Harry & Schroeder (2000, ISBN:978-0-385-49437-2), and the AIAG SPC Reference Manual (2005, ISBN:978-1-60534-026-3).

Version: 0.1.0
Depends: R (≥ 3.5.0)
Imports: stats
Suggests: ggplot2 (≥ 3.0.0), testthat (≥ 3.0.0), knitr, rmarkdown
Published: 2026-08-03
DOI: 10.32614/CRAN.package.ProcessCapabilityR
Author: Shikhar Tyagi ORCID iD [aut, cre], Sumit Kumar [aut], Vrijesh Tripathi [aut]
Maintainer: Shikhar Tyagi <shikhar1093tyagi at gmail.com>
License: MIT + file LICENSE
NeedsCompilation: no
Materials: README
CRAN checks: ProcessCapabilityR results

Documentation:

Reference manual: ProcessCapabilityR.html , ProcessCapabilityR.pdf
Vignettes: Getting Started with ProcessCapabilityR (source, R code)

Downloads:

Package source: ProcessCapabilityR_0.1.0.tar.gz
Windows binaries: r-devel: ProcessCapabilityR_0.1.0.zip, r-release: ProcessCapabilityR_0.1.0.zip, r-oldrel: ProcessCapabilityR_0.1.0.zip
macOS binaries: r-release (arm64): ProcessCapabilityR_0.1.0.tgz, r-oldrel (arm64): ProcessCapabilityR_0.1.0.tgz, r-release (x86_64): ProcessCapabilityR_0.1.0.tgz, r-oldrel (x86_64): ProcessCapabilityR_0.1.0.tgz

Linking:

Please use the canonical form https://CRAN.R-project.org/package=ProcessCapabilityR to link to this page.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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