A method is provided for controlling an electrical system. A first characteristic value of the electrical system is determined. For the first characteristic value, a suitable first group of optimizing variables is determined. A first group of command variables suitable for the first group of optimizing variables is determined. For the first group of command variables, a first group of current boundary values is determined. For each boundary value of the first group of current boundary values, a prediction is made to obtain a first group of predicted boundary values. A probability is assigned to each predicted boundary value of the first group of predicted boundary values to obtain a first group of predicted, probability-related boundary values. All boundary values of the first group of current boundary values and of the first group of predicted, probability-related boundary values are prioritized in order to obtain prioritized boundary values. The prioritized boundary values are used to calculate at least one control value with which the system may be controlled.