Functional capability space and optimum process adjustments for manufacturing processes with in-specs failure
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. ISSN 0740-817XFull text not available from this repository.
Official URL: http://dx.doi.org/10.1080/07408170902789027
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|
H Social Sciences > HD Industries. Land use. Labor > HD28 Management. Industrial Management
|Divisions:||Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)|
|Journal or Publication Title:||IIE Transactions|
|Publisher:||Taylor & Francis Inc.|
|Number of Pages:||12|
|Page Range:||pp. 95-106|
|Access rights to Published version:||Restricted or Subscription Access|
|Funder:||UK STAR, Motorola Corp|
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