Practical method of cost-based tolerancing

Akira Yabe

doi:10.1117/12.928179

15 October 2012 Practical method of cost-based tolerancing

Akira Yabe

Proceedings Volume 8491, Optical System Alignment, Tolerancing, and Verification VI; 849105 (2012) https://doi.org/10.1117/12.928179
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

Abstract

The tolerances are given to keep the performance criteria within the acceptable values in the manufactured lenses. If the tolerances and the performance criteria are given, the yield of the manufacturing can be estimated with the Monte Carlo simulation. The tolerance determines the manufacturing cost. The manufacturing cost should be as low as possible. The cost-based tolerancing is to determine the tolerances accounting for the manufacturing cost. This optimization problem looks complicated and time-consuming when the yield is viewed as a function of the tolerances. The author found the problem is dramatically simplified if the variances or averages of the critical performance criteria are used as the independent variables of the optimization. The optimal tolerance set can be found with a few trials of the Monte Carlo simulation.

Citation Download Citation

Akira Yabe "Practical method of cost-based tolerancing", Proc. SPIE 8491, Optical System Alignment, Tolerancing, and Verification VI, 849105 (15 October 2012); https://doi.org/10.1117/12.928179

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