Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)
- Volume 7 Issue 1
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- Pages.22-31
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- 2008
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- 1598-6721(pISSN)
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- 2288-0771(eISSN)
Robust Design Using Operating Window
기능창을 이용한 강건설계법
Abstract
The operating window method is a novel approach in quality improvement. But it has not received deserved attention in academic research. If a critical factor for competing failure modes can be identified, the probability of failure can be reduced by widening the operating window of this factor. Traditional SN ratio for the operating window advocated by Taguchi has a critical shortcoming, which has been derived under the assumption that failure rates are determined by the operating window factor only. A new metric for robustness is given for the operating window method, which has relaxed the restrictive assumption of Taguchi's SN ratio. And procedures for determining optimal conditions based on the new metric is presented. The effectiveness of the proposed approach over the traditional practice is tested with the aid of a wave soldering process.
Keywords