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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
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 |
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| 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: |
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| 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 |
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