Journal of Quality Engineering Society
Online ISSN : 2189-9320
Print ISSN : 2189-633X
ISSN-L : 2189-633X
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Volume 1, Issue 5
Displaying 1-7 of 7 articles from this issue
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  • System　Selection
    Genichi Taguchi
    1993 Volume 1 Issue 5 Pages 2-8
    Published: December 15, 1993
    Released on J-STAGE: March 24, 2016
    DOIhttps://doi.org/10.18890/qes.1.5_2
    JOURNAL FREE ACCESS
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    The　role　of　engineers　is　not　to　choose　the　function　what　customers　want　but　tochoose　a　good　generic　system　to　perform　the　function　required.　There　are　many　generic　systems　to　perform　the　same required　function.　From　the　view　point　of　quality　engineering,　a　simple　system　is　not　good　to　improve　its　functionability. A　system　to　be　developed　should　have　enough　complicate　non　lineality.　Otherwise,　we　can　not　develop　a　generic　system　to　reach　the　level　of　high　functionability　at　reasonable　cost　by　setting.level　of various　parameters　of　thesystem.　The　generic　technology　development　using　a　test　peace　is　the　best time　to　improve　robustness　of　technology　is　emphasized　in　this　article.
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  • A　knowledge　transfer　of　the　Quality　Engineering
    Masataka Yoshizawa
    1993 Volume 1 Issue 5 Pages 9-13
    Published: December 15, 1993
    Released on J-STAGE: March 24, 2016
    DOIhttps://doi.org/10.18890/qes.1.5_9
    JOURNAL FREE ACCESS
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    During　10　years,　Xerox　Co.　and　Fuji　Xerox　Co.　work　together　the　implementation　of　the　Quality Engineering.　This　paper　describe　how　to　transfer　the　quality　engineering　into　affiliate　company. It's　successful　points　and　knowledge　transfer　are　discussed.
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  • How　do　you　explain　"Quality　Engineering"?　(5)
    Kazuo Tatebayashi
    1993 Volume 1 Issue 5 Pages 14-19
    Published: December 15, 1993
    Released on J-STAGE: March 24, 2016
    DOIhttps://doi.org/10.18890/qes.1.5_14
    JOURNAL FREE ACCESS
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    It　seems　that　some　of　the　criminals　who　make　"Quality　Engineering"　hard　to　understand　are　the calculation　formulas　of　SN　Ratio.　lt　is　true　that　there　are　many　engineers　who　cannot　understand the　formulas　of　SN　Ratio　and　cannot　proceed. So,　I　would　like　to　explain　how　to　caluculate　SN　ratio　and　the　meanings　of　formulas　using　some data　in　this　edition.
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  • Development　of　Charpy　lmpact　Testing　Machine Using　Parameter　Design
    Hajime lshida, Taro Okabe, Akira Yonekura
    1993 Volume 1 Issue 5 Pages 20-26
    Published: December 15, 1993
    Released on J-STAGE: March 24, 2016
    DOIhttps://doi.org/10.18890/qes.1.5_20
    JOURNAL FREE ACCESS
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    The　Charpy　impact　test　machine　was　developed　to　measure　impact　energy.　Parameter　design　was conducted　to　improve　the　performance　by　optimizing　the　component　parts　in　the　machine.　The Charpy　impact　test　pieces　used　as　the　signal　factor　were　manufactured　by　the　condition　which　was obtained　from　a　separate　heat　treatment　study.　An　improvement　of　3.3　db　over　the　conventional testing　machine　was　accomplished.
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  • Process　Optimization　of　Microalgae　Production by　Parameter　Design
    Makoto Kubonaga, Eri Fujimoto
    1993 Volume 1 Issue 5 Pages 27-34
    Published: December 15, 1993
    Released on J-STAGE: June 10, 2016
    DOIhttps://doi.org/10.18890/qes.1.5_27
    JOURNAL FREE ACCESS
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    Parameter　design　used　in　quality　engineering　was　applied　in　the　study　of　microalgae　production process　in　order　to　obtain　the　ideal　growth　curve.　ln　the　study,　seven　factors　including　illumination and　six　media　components　were　used　as　control　factors　and　the　experiments　were　conducted　using an　L18　orthogonal　array.　Eight　culture　days　were　considered　as　the　signal　factor　levels.　Optical density　(OD680nm)　was　measured　every　day.　lt　was　considered　as　the　ideal　situation　that　the　logarithm　of　optical　density　be　linear.　According　to　the　results　of　experiments,　sensitivity,　S,　and　SN　ra tio　of　dynamic　characteristic　were　calculated.　The　optimum　condition　was　determined　from　control factor　levels　which　gave　the　large　values　of　sensitivity　and　SN　ratio.　An　improvement　was　estimated as　4.8386　db　in　SN　ratio　and　1.2851　db　in　sensitivity.　The　confirmatory　experiment　showed　a　good　reproducibility.
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  • VISCOSITY　STABILITY　IMPROVEMENT　OF　COATING MATERIAL　USING　QUALITY　ENGINEERING
    TAKEO NAKAJIMA
    1993 Volume 1 Issue 5 Pages 35-39
    Published: December 15, 1993
    Released on J-STAGE: March 24, 2016
    DOIhttps://doi.org/10.18890/qes.1.5_35
    JOURNAL FREE ACCESS
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    Although　the　viscosity　of　coating　material　depends　on　the　customer　demand,　the　viscosity　stability　is　always　needed.　Here　we　have　studied　the　improvement　of　the　viscosity　stability　using　quality engineering.　The　objective　characteristic,　S/N　ratio　η　,　was　used　as　the　measure　of　the　viscosity stability.　The　experiments　were　conducted　on　the　orthogonal　array　with　the　assigened　control　factors.　And　the　S/N　ratio　η　is　ware　analyzed　and　the　conditions　of　the　small　viscosity　change　were found.　Our　optimum　conditions　improved　the　viscosity　stability　a　lot　in　comparison　with　the　current　conditions,which　showed　the　effectiveness　of　quality　engineering.　Besides　the　viscosity　stability study,　we　analyzed　the　sensitivity　and　investigated　the　method　how　to　obtain　the　target　viscosity. Although　the　viscosity　of　coating　material　depends　on　the　customer　demand,　the　viscosity　stability study,　we　analyzed　the　sensitivity　and　investigated　the　method　how　to　obtain　the　target　viscosity.
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