The software is based on the stochastic reactor model (SRM), which is stated in terms of a weighted stochastic particle ensemble. SRM is particular useful in the context of engine modelling 
as the dynamics of the particle ensemble includes detailed chemical kinetics  whilst accounting for inhomogeneity in composition and temperature space arising from on-going fuel injection, heat transfer and turbulence mixing events.  Through this coupling, heat release profiles and in particular the associated exhaust gas emissions (Particulates, NOx, Carbon monoxide, Unburned hydrocarbon etc.) can be predicted more accurately than if using the more conventional approaches of standard homogenous and multi-zone reactor methods.