R Observatory: Metrics for GammaFrailtySPC version 0.1.0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

GammaFrailtySPC

0.1.0

Statistical Process Control Based on Gamma-Frailty AFT Models

0packages depend

32downloads / year

65.7%test coverage

8/8checks pass

Overview

About

Maintained by Shikhar TyagiFirst published 2026-08-081 releasesCRAN page ↗

Implements statistical process control ('SPC') monitoring schemes for heterogeneous reliability observations using Accelerated Failure Time ('AFT') models integrated with continuous gamma frailty. It accommodates both uncensored and right-censored reliability observations in the presence of observed and unobserved covariates. Provides Phase I maximum likelihood estimation of Weibull 'AFT' gamma frailty model parameters, and Phase II monitoring procedures including probability-limits-based control charts, exponentially weighted moving average ('EWMA') charts with conditional expected values, and likelihood-ratio cumulative sum ('CUSUM') control charts. Competing 'CUSUM' schemes (ignoring unobserved frailty or both covariates) and Average Run Length ('ARL') simulation utilities are also provided. The statistical methodology is based on Asadzadeh (2022) doi:10.1080/00949655.2021.1959582.

Install

R (CRAN)Fedora (COPR)openSUSE (OBS)

install.packages("GammaFrailtySPC", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-GammaFrailtySPC

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-GammaFrailtySPC

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

8OK

Slowest check: 2.1 min · r-oldrel-windows-x86_64

Code health

Yes

Tests · ratio 0.07

65.7%

Coverage · measured lines

100%

Documentation · exports

6

Dependencies · direct

Check history

OK2026-08-09
6 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesYes · dynamicpkgdown siteNoNEWSNoCode of conductNoContributing guideNo

Examples that run: 88%
Documented parameters: 98%
Return-value docs: 100%
References docs: 80%

Downloads

32

CRAN downloads in the past year

Rank #24,892 · ~0/day · ~3/mo

GammaFrailtySPC Releases R versions

Daily download trend is not available in this view yet.

3230 days

3290 days

321 year

Compare downloads with other packages →

Dependencies

Declared dependencies

4 external dependencies (excludes base and recommended)

Depends (1)

R >= 4.0.0

Imports (6)

maxLiksurvivalstatsgraphicsgrDevicesutils

LinkingTo (0)

none

Suggests (3)

testthat knitr rmarkdown

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

Datasets

People & History

People (4)

Maintainer (1)

Shikhar Tyagi

Author, Maintainer

Authors (4)

Author, Maintainer

Author

Author

Author

Package Timeline

1 release. R releases are shown for context.

0.1.0Latest
2026-08-08 · current release
R
R 4.6.0 released · 2026-04-24

Package metadata

First published: 2026-08-08
Total releases: 1 / 1 yrs
License: GPL-3 OSI
Minimum R: ≥ 4.0.0
Bundled data: 2.3 KB / 1 file
Download size: not tracked yet
Installed size: not tracked yet
With dependencies: not tracked yet

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("GammaFrailtySPC")

Format

Tyagi, S., Pandey, A., Singh, B., & Tripathi, V. (2026). GammaFrailtySPC: Statistical Process Control Based on Gamma-Frailty AFT Models (Version 0.1.0) [Computer software]. https://doi.org/10.32614/CRAN.package.GammaFrailtySPC

This is what citation() produces when a package has no citation file of its own. If it prints something else, use that.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for GammaFrailtySPC version 0.1.0 [Data set]. HJJB, LLC. Data release v2026-08-11. https://doi.org/10.5281/zenodo.21843040

From data release v2026-08-11, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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