The period to be covered by the simulation is specified on this dialog. You have to specify the simulation start date, the overall number of time steps and the overall time step interval.
The simulation always starts with time step number 0 and the simulation startdate is the historical data and time corresponding to time step 0. The simulation end date is presented for reference.
The number of time steps to be included for warm-up and warm-down of the applied environmental conditions is also to be set. By default the warm up/down no. of time steps are both 10% of the overall number of time steps.