Method for predictive determination of a process variable based on an assignment of a discrete measured value

A method for predictive determination of a process variable (P) in a technical installation using a circuit having a database and a processor, the method comprising:

• receiving measured values from a sensor;
• recording, in the database, the measured values for the process variable (P) of the technical installation at predeterminable points in time during operation of the technical installation;
• and
• in the processor:
• combining temporally successive recorded measured values to form a weighted measured value;
• assigning a discrete measured value to each weighted measured value;
• estimating a future time profile of the process variable (P) using a regression of the discrete measured values;
• and
• calculating a point in time at which the process variable (P) reaches a predeterminable limit value,
• wherein each weighted measured value that lies in a predeterminable tolerance band (H1 ... H8) is assigned a same discrete measured value.