Casting (Simulation in Development -> Simulation). From a fully developed simulation, a copy (clone) is created (not sure we need to clone any more at this point. Just keep working on the simulation - JA), and this new template becomes a simulation once it is connected to users in the real world and time frame and other properties of the simulation are specified. A simulation is subdivided into one or more simulation cases that each have their own set of users and will execute independently of eachother. A large class can thus be divided into smaller groups where each group has its own simulation case to play in.