Measuring the Capability for One Process with Spherical Tolerance

Liang Chyau Sheu; Chi Huang Yeh; Ching Ho Yen; Chia Hao Chang

doi:10.4028/www.scientific.net/AMM.284-287.3717

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Measuring the Capability for One Process with Spherical Tolerance
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 284-287Measuring the Capability for One Process with...

Measuring the Capability for One Process with Spherical Tolerance

Abstract:

Process capability indices, Cp, Cpk, and Cpm, are well-known indices used widely in the manufacturing industry for measuring process reproduction capability according to manufacturing specifications, but limited to cases with single engineering specification. Therefore, for processes where the quality characteristic is the location relative to a specific location, they can not provide an effective measure. In this paper, we propose a process loss index LG to evaluate the process capability for this issue. Based on the index, we provide the corresponding transformation for production yield. In addition, we tabulate some critical values for process loss index LG to judge if the process capability is capable. The proposed method is useful for the practitioners to measure the process loss and determine whether a process meets the present process yield requirement.

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Periodical:

Applied Mechanics and Materials (Volumes 284-287)

Pages:

3717-3726

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.284-287.3717

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Online since:

January 2013

Authors:

Liang Chyau Sheu, Chi Huang Yeh, Ching Ho Yen, Chia Hao Chang

Keywords:

Critical Value, Process Capability, Process Loss Index, Production Yield

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