Method for Operating a Production System, Computer Program, and Data Carrier

A method for operating a production system that produces a component from a semifinished product having at least one semifinished product property in a process that is characterized by a parameter set comprising at least one process parameter, wherein the parameter set is specified and/or a component quality is ascertained by a trained model based on the at least one semifinished product property, and a stability of the trained model is determined according to the method, the method comprising:

• detecting at least one error value of the at least one semifinished product property and/or at least one state variable and/or the at least one process parameter and/or the component quality;
• forming a data set for the at least one semifinished product, which, for the at least one semifinished product property, comprises a semifinished product value with the associated error value and/or the state variable with the associated error value and/or the at least one process parameter with the associated error value and/or the component quality with the associated error value;
• selecting at least one control value in an interval formed by the respective error value around the semifinished product value and/or the state variable and/or the process parameter and/or the component quality;
• forming a control set that comprises correspondence data using the trained model based on the at least one selected control value;
• forming a difference between the data set and the control set;
• and
• deriving a threshold value from the difference.