Abstract
The paper deals with statistical analysis of geometric features within tolerance zone. The geometric features and their tolerance zone are firstly analyzed based on the JIS standards, and the parameters are established to represent the deviations of the geometric features from the nominal shapes. A systematic method is then proposed to analyze the probability that the geometric feature is included in the tolerance zone and to estimate the standard deviations of the deviation parameters that satisfy the constraints specified by the tolerance zones. The statistical properties of the deviation parameters of the geometric features are analyzed, and the statistical distributions of the deviation parameters of the geometric features are theoretically clarified.
