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Functional capability space and optimum process adjustments for manufacturing processes with in-specs failure

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Mannar, Kamal and Ceglarek, Darek (2010) Functional capability space and optimum process adjustments for manufacturing processes with in-specs failure. IIE Transactions, Vol.42 (No.2). pp. 95-106. doi:10.1080/07408170902789027 ISSN 0740-817X.

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Official URL: http://dx.doi.org/10.1080/07408170902789027

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Abstract

This paper introduces a methodology for functional capability analysis and optimal process adjustment for products with failures that occur when design parameters and process variables are within tolerance limits (in-specs). The proposed methodology defines a multivariate functional capability space (FC-Space) using a mathematical morphology operation, the Minkowski sum, in order to represent a unified model with (i) multidimensional design tolerance space; (ii) in-specs failure region(s); and, (iii) non-parametric, multivariate process measurements represented as Kernel Density Estimates (KDEs). The defined FC-Space allows the determination of a desired process fallout rate in the case of products with field failures that occur within design tolerances (in-specs). The outlined process adjustment approach identifies the optimum position of the process mean in order to minimize the overlap between the KDEs and in-specs failure regions, i. e., achieve the minimum possible process fallout rate for current process variation. The FC-Space-based process adjustment methodology is illustrated using a case study from the electronics industry where the in-specs failure region is identified based on warranty information analysis.

Item Type: Journal Article
Subjects: T Technology
H Social Sciences > HD Industries. Land use. Labor > HD28 Management. Industrial Management
Divisions: Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
Journal or Publication Title: IIE Transactions
Publisher: Taylor & Francis Inc.
ISSN: 0740-817X
Official Date: 2010
Dates:
DateEvent
2010Published
Volume: Vol.42
Number: No.2
Number of Pages: 12
Page Range: pp. 95-106
DOI: 10.1080/07408170902789027
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: UK STAR, Motorola Corp
Grant number: EP/E044506/1

Data sourced from Thomson Reuters' Web of Knowledge

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