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ReliaGrowR

Introduction

Welcome to ReliaGrowR! This package provides modeling and plotting functions for Reliability Growth Analysis (RGA), including:

  • Duane Analysis
  • Crow-AMSAA
  • Piecewise NHPP
  • Piecewise NHPP with Change Point Detection

RGA is an important part of reliability engineering, focused on improving reliability during development and testing of products. By analyzing failure data, RGA helps engineers and researchers identify trends, estimate reliability parameters, and track improvements over time.

To learn more about RGA and this package, please view the vignette.

Installation

To install the release version of ReliaGrowR, use:

install_packages('ReliaGrowR')

You can install the development version of ReliaGrowR like so:

devtools::install_github('paulgovan/ReliaGrowR')

Example

Here is a basic example of Reliability Growth Analysis. First, load the package.

library(ReliaGrowR)

Next, suppose a machine has failed at the following times with the corresponding number of failures.

times <- c(100, 200, 300, 400, 500)
failures <- c(1, 2, 1, 3, 2)

To perform RGA, use the rga function and plot the results. The plot displays the cumulative failures over time along with the fitted reliability growth model.

result <- rga(times, failures)
plot(result, main = "Reliability Growth Analysis", xlab = "Cumulative Time", ylab = "Cumulative Failures")

Code of Conduct

Please note that the ReliaGrowR project is released with a Contributor Code of Conduct. By contributing to this project, you agree to abide by its terms.

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Version

Install

install.packages('ReliaGrowR')

Monthly Downloads

314

Version

0.3.2

License

CC BY 4.0

Issues

Pull Requests

Stars

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Maintainer

Paul Govan

Last Published

December 9th, 2025

Functions in ReliaGrowR (0.3.2)

print.duane

Print method for duane objects.
ReliaGrowR-package

ReliaGrowR: Reliability Growth Analysis
plot.duane

Plot Method for Duane Analysis
print.rdt

Print method for rdt objects
ppplot.rga

P-P Plot for RGA Objects
print.rga

Print method for rga objects.
grwr_api

ReliaGrowR API
qqplot.rga

Q-Q Plot for RGA Objects
plot.rga

Plot Method for RGA Objects
rga

Reliability Growth Analysis.
rdt

Reliability Demonstration Test (RDT) Plan Calculator
weibull_to_rga

Weibull to RGA
duane

Duane Analysis
testdata

Reliability Test Data