Geometrical product specifications: Alternative standardization principles, coordinate systems, models, classification and verification

Abstract

The paper is submitted for discussion the improvement innovations of series of international standards ISO on geometrical product specifications GPS. The innovation aim is to guarantee a high level of machine-building manufacturing quality indicators of functioning, accuracy and precision. At the basis of the innovations one can find: engineering quality principles inversion and datums unity; the real products adequate modeling; the coordinate system informativeness; the specifications two-measurical structural, consisting linear measure and angle measure; the minimaxity of real feature size having two boundary values largest and smallest dimensions.