How to define a simulation Step 02 Define what you want to be included in the simulation by marking it on the left side and transferring it over to the right side with the little arrow. - The double arrow means that all activities will be tranferred. The Simulation type - Test cycles for capacity must be choosen when you have defined test cycles with mouse click rather than a flow definition. (Read more) In this case we have defined a real-time flow definition so we have to choose the real time w. random order generation simulation. Simulation blocks has to be choosen when you have defined a simulation block e.g with conveyors.