Phase I Shewhart X-Bar Chart R package PH1XBAR version 0.11.3 The purpose of 'PH1XBAR' is to build a Phase I Shewhart control chart for the basic Shewhart, the variance components and the ARMA models in R for subgrouped and individual data. More details can be found: Yao and Chakraborti (2020) <doi: 10.1002/qre.2793>, Yao and Chakraborti (2021) <doi: 10.1080/08982112.2021.1878220>, and Yao et al. (2023) <doi: 10.1080/00224065.2022.2139783>. Software Depends: R (>= 3.5.0) Imports: forecast, mvtnorm, pracma, VGAM Yuhui Yao <yyao17@ua.edu> Comprehensive R Archive Network (CRAN) Yuhui Yao [aut, cre], Subha Chakraborti [ctb], Tyler Thomas [ctb], Jason Parton [ctb], Xin Yang [ctb] GPL-3 2025-06-19 application/tgz https://CRAN.R-project.org/package=PH1XBAR doi:10.32614/CRAN.package.PH1XBAR