Features and computation power available in CAD systems allow modeling of manufacturing processes to a certain extent. This paper deals with the simulation and optimization of the final coating by plasma spraying. Experimental confirmation of the model is described in and simulation results are presented. Although a number of questions regarding the formation of the coating remain in some critical cases, the results show that simple models provide a sufficient approximation of the simulated plot for off-line robot programming. Paper includes a German-language abstract.