Method and apparatus for determining the similarity of parallel manufacturing machines

Abstract

The present invention relates to a computer-implemented method (100) for determining the similarity of parallel identical production machines (321, 322, 323, 331, 322, 323) of a production stage (320, 330) of a mass-produced product, comprising the following steps: - Determining (110) a plurality of measured values ​​of a characteristic physical quantity for the parallel identical production machines (321, 322, 323, 331, 322, 323) by measuring on a plurality of intermediate or final products of the production, wherein the characteristic physical quantity is a property of the mass-produced product significantly influenced by the production machine (321, 322, 323, 331, 322, 323);- Providing (120) a histogram depending on the plurality of measured values ​​of the physical quantity for each of the parallel manufacturing machines (321, 322, 323, 331, 322, 323), wherein the histograms (210) in particular comprise similarly defined classes (211), each of which is assigned a frequency (212) corresponding to the number of measured values ​​assignable to the class (211); - Determining (130) the similarity between any two of the parallel similar manufacturing machines (321, 322, 323, 331, 322, 323) depending on a corresponding angle between vectors (220) derived from the histograms (210), wherein a vector (220) is defined by the frequencies assigned to the defined classes (211) for one of the parallel similar manufacturing machines (321, 322, 323, 331, 322, 323) are formed.;

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