The invention relates to a method for controlling and/or regulating an industrial process for producing or processing products, wherein a physicomathematical model of the industrial process is formed, with which control parameters for controlling or regulating the industrial process are calculated during the production or processing of the product, a number of measurement values is detected, and the model is corrected with a number of primary correction factors, the number of primary correction factors being equal to the number of measurement values. The method is characterized in that the model is corrected with a number of secondary correction factors, such as with a correction factor reflecting the speed of the phase conversion in the rolling mill to be cooled, and in that the number of all correction factors is greater than the number of all measurement values, wherein at least the secondary correction factors are calculated numerically.