Statistical evaluation of geometrical features with oblique distribution

On workpieces of mechanical engineering, oblique distributions rising to the left are to be expected for geometrical features which, for functional reasons, usually require the observance of an admissible max. value of a characteristic, as e.g. form deviations. An evaluation based on normal distribution must be queried for these reasons. For rational quality analysis and inspection of features with oblique distribution, statistical evaluation methods are required which are suitable for acquiring the quality and reliability of the products and of the production processes in machine construction. (orig.)