1. A method, implemented by a processor including a memory, for automatic adjustment of at least one of several working units of a self-propelled harvesting machine involved in a harvesting process, comprising the steps of: the processor initially modeling the harvesting process by at least one program map that tracks a current harvesting process, based on a data base characteristic of the current harvesting process; determining an initial working point of the at least one of the working units on a basis of the initial modeling of the harvesting process by the at least one program map; adapting continuously the at least one program map on a basis of data currently collected by measurements and which influence the harvesting process; determining a new working point of the at least one working unit of the harvesting machine depending on the continuous adapting of the at least one program map; approximating the setting of the working unit at the new working point in an iterative process, starting from the initial working point of the at least one working unit of the harvesting machine; and displaying optimization criteria of the automated process to the operator of the harvesting machine in a display unit in a selectable manner using a touchscreen function or a keypad, said optimization criteria comprising the quality of the crop material required for a certain intended use of the crop material, the optimization criteria for the working units or both; wherein the program map maps a separation process, in which crop loss due to separation is depicted as an output variable as a function of the rotor speed and throughput is depicted as an input variable as a function of crop layer thickness.