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Maximum conformance rate‐based tolerance design

Chiu‐Chi Wei (Chung‐Hua University, Hsin‐Chu, Taiwan)
Yeong‐Hoang Lee (Ta‐Hwa Institute of Technology, Hsin‐Chu, Taiwan)
Ching‐Liang Chang (Ta‐Hwa Institute of Technology, Hsin‐Chu, Taiwan)

Integrated Manufacturing Systems

ISSN: 0957-6061

Article publication date: 1 October 1999


Proposes a new formulation for allocating process tolerances. The major contribution of the model is to assign tolerances with maximization of the conformance rate of the entire process. The cumulative standard normal probability is used to estimate the scrap rate of each operation with respect to the machining accuracy of equipment, therefore, the design engineers are able to predict the failure rate before production. Results of comparison with other methods indicate that the proposed model can cost‐effectively assign tolerances.



Wei, C., Lee, Y. and Chang, C. (1999), "Maximum conformance rate‐based tolerance design", Integrated Manufacturing Systems, Vol. 10 No. 5, pp. 284-288.




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