Patent ID: 6842656

Claim:
A method for setting process parameters of a production process for an elongate sheet-like product to achieve a predeterminable quality, with the following features; recording a plurality of process parameters of the production process as a function of time in the form of process data, processing the process data in at least a first data processing unit and outputting as production data, observing the surface of the product by means of a surface inspection system within or at the end of the production process in a process step, the observation data being used in at least a second data processing unit to record the entire surface as a surface map with established surface features in the form of surface data and to classify the surface features according to various types and/or according to size and/or according to frequency and enter them in the surface map according to their position, outputting the various classes and positions of surface features as product data, feeding the production data and the product data together to at least a third data processing unit and investigating the production data and the product data there for correlations existing between them, with rules as to how the product data depend on specific production data being established, setting the process parameters in accordance with the established rules to achieve a desired quality as a feedback to the production process.