In order to automatically calculate an operational sequence of processes that determine an output value from at least one input value, a multitude of processes (P1 P8), whose inputs are provided with at least one of the attributes: input value of the same calculation cycle (PRE), input value of the preceding calculation cycle (POST), input value from any calculation cycle (ANY), are arranged in such a manner that a process, which does not have any input with the attribute input value of the same calculation cycle (PRE), is determined as the first process of a calculation cycle and, in successive analogous steps, determines a quantity of possible sequences.