eCerto is an R-package providing functions to perform statistical tests required during the production of a certified reference material.
The production of certified reference materials (CRMs) is a core task of
the Bundesanstalt für Materialforschung und -prüfung (BAM). Various statistical
tests are required and applied depending on the task and recorded data to ensure
that reported values of CRMs are appropriate. Many of them are calculated
according to the procedures described in ISO GUIDE 35:2017.
The eCerto package contains a Shiny-App which provides functionality to
load, process, report and backup data for the statistical evaluation of analyses
conducted during CRM production.
The app also allows to perform long term stability monitoring (or post certification monitoring) to ensure the CRM values remain within specification.
Another app module allows to perform statistical tests for analytical method validation, computing the working range and linearity of a method.
To run eCerto locally you can install the development version from GitHub and start the app with:
# install.packages("devtools")
devtools::install_github("janlisec/eCerto")
eCerto::run_app()Other than that, eCerto currently has only few exported functions. Before installation you can test the app version hosted at BAM using your own or the provided example data.
A description of eCerto showing a re-evaluation of previously published CRM data can be found in this scientific article. Most of the functionality is also described in the online help.