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.