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Geometrical product specifi­cation (GPS) comprises con­cep­tionally dif­fer­ent types of stand­ards that describe the geometric prop­erties of a product during con­struction, production, test­ing, quality assurance, etc.

In the GPS matrix model standard chains for the different features, such as the size, distance, form features, sur­face properties, pro­file, etc. are gen­er­ated in the rows.

The columns (= chain links):

  1. Drawing specifications (DIN EN ISO 21920-1)
  2. Parameters (DIN EN ISO 21920-2 and 12085)
  3. Properties of parameters (DIN EN ISO 21920-2, 21920-3, 16610 and 12085)
  4. Comparison and compliance (DIN EN ISO 14253-x)
  5. Measurement (DIN EN ISO 21920-3 and 12085)
  6. Requirements for the measuring equipment
    (DIN EN ISO 3274, 16610)
  7. Calibration requirements (DIN EN ISO 5436, 12179)

The most important standards for the surface profile parameters are speci­fied in ().