A process-oriented and trajectory-based Discrete-Event Simulation
(DES) package for R. It is designed as a generic yet powerful framework. The
architecture encloses a robust and fast simulation core written in 'C++' with
automatic monitoring capabilities. It provides a rich and flexible R API that
revolves around the concept of trajectory, a common path in the simulation
model for entities of the same type. Documentation about 'simmer' is provided
by several vignettes included in this package, via the paper by Ucar, Smeets
& Azcorra (2019,