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Activity Number:
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385
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Type:
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Contributed
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Date/Time:
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Thursday, August 15, 2002 : 8:30 AM to 10:20 AM
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Sponsor:
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Section on Physical & Engineering Sciences*
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| Abstract - #301338 |
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Title:
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Multivariate Capability Indices Using Process-Oriented Basis Representation
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Author(s):
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Earnest Foster*+ and Russell Barton and Natarajan Gautam
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Affiliation(s):
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Pennsylvania State University and Pennsylvania State University and Pennsylvania State University
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Address:
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156 Edith St, State College, Pennsylvania, 16803, USA
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Keywords:
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Multivariate ; Process-oriented ; Capability ; Indices
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Abstract:
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Multivariate capability indices are examined as a diagnostic for process quality improvement. A number of multivariate capability indices have been proposed, but the literature does not suggest a method for measuring quality characteristics in a way that links shift patterns directly to their causes. Multivariate capability indices using a process-oriented basis representation allows the computation of cause-related index values. The method uses regression coefficients as process-oriented data. When causes operate independently, the process-oriented approach simplifies yield-based capability calculations. A screen printing example demonstrates the efficiency and effectiveness of the new process-oriented capability method. Computational results produced capability estimates with 8% to 25% of the error of an existing yield-based method. We also propose a new extension to a current multivariate capability method to improve the accuracy of its index computations.
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