You may consult one of the PROAST manuals, depending on the version type (platform) that you are using.
PROAST MANUAL WebApp.pdf
Brief guidance on how to work with the web application of PROAST on the RIVM server (proastweb.rivm.nl).
PROAST MANUAL menu version.pdf
Comprehensive description of the menu version of PROAST as an R-package. This is the basic version of PROAST and includes all PROAST methods and options.
PROAST MANUAL GUI version.pdf
Description of the GUI version of PROAST as an R-package, discussing the standard methods in PROAST in some detail.
PROAST quick start.pdf
A quick introduction for first use of PROAST as an R package.
Manual web application MILKINGS.pdf
Guidance on calculating withdrawal periods from concentrations measured in the same animals over time.