The discrete element method (DEM), which applies to bulk material simulations, is introduced in this work. Its structure and inherent calculation processes are analysed, approaches on model calibration and the necessity of calculation time prognosis are expounded. By observing and considering all relevant variables which influence the calculation time of the simulation, a prediction formula is developed. After designing a suitable and practical input screen, the validity of the formula is verified experimentally. A closing summary of acquired insights is presented and prospects of further research conclude this diploma thesis.