Journal of Quality Engineering Society
Online ISSN : 2189-9320
Print ISSN : 2189-633X
ISSN-L : 2189-633X
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Volume 1, Issue 3
Displaying 1-5 of 5 articles from this issue
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  • Economics and Quality Engineering
    Genichi Taguchi
    1993Volume 1Issue 3 Pages 2-7
    Published: June 01, 1993
    Released on J-STAGE: December 24, 2016
    DOIhttps://doi.org/10.18890/qes.1.3_2
    JOURNAL FREE ACCESS
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    The importantness of productivity to improve living standard is discussed first and then the role of technology for productivity is introduced. Quality engineering is intended to improve the efficiency of technology development within R&D with specimen instead of actual product design. Finally quality and cost trade-off is explained with loss function.

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  • How　do　you　explain　"Quality　Engineering"?　(3)
    Kazuo Tatebayashi
    1993Volume 1Issue 3 Pages 12-18
    Published: August 15, 1993
    Released on J-STAGE: March 24, 2016
    DOIhttps://doi.org/10.18890/qes.1.3_12
    JOURNAL FREE ACCESS
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    When　engineers　see　a　case　study　of　Robust　Design,　particularly　one　involving　recent　technologydevelopment,　they　feel　that　it　is　quite　dlfferent　from　the　traditional　DOE　(design　of　Experiment). What　are　the　differences　between　traditional　characteristics　and　the　SN　ratioof　dynamic　and　static characteristic　of　quality　engineering?　ln　addition,　what　relationships　do　they　have　? Therefore,　I　would　like　to　explain　characteristics　for　quality　improvement,　comparing　the　SN　ratio of　dynamic　and　static　characteristic　in　quality　engineering　to　the　traditional　characteristics.
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  • Inprovement　Of　Characteristic　Of　「Differential Amplifier　Circuit」　・　LSI
    Mikio lwase, Tokio Sawataishi
    1993Volume 1Issue 3 Pages 19-24
    Published: August 15, 1993
    Released on J-STAGE: March 24, 2016
    DOIhttps://doi.org/10.18890/qes.1.3_19
    JOURNAL FREE ACCESS
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    The　differential　amplifier　circuit　is　one　of　the　most　important　basic　circuit　used　in　analog　integrated　circuit.　ln　designing　this　circuit　integrated　as　an　LSI,　we　have　conducted　a　parameter　design using　a　dynamic　characteristic.　The　ideal　function　of　this　circuit　is　to　generate　the　output　voltage equal　to　the　input　voltage.　ln　order　to　achieve　its　robust　function,　it　is　essential　to　take　LSI　manufac　turing　variability　noise　factors　into　consideration.　We　have　found　the　conventional　method　where circuit　elements　were　simulated　at　3-1evels(min./mean/max.)to　determine　the　optimum　design,cannot　reduce　variability　of　output　voltage　effectively.　At　this　time,　we　selected　circuit　parameters that　may　influence　the　characteristic　and　assigned　them　to　an　L18　orthogonal　array　and　conducted　a parameter　design　by　varying　LSI　manufacturing　noise　factors.　Circuit　simulator　was　used　to　run the　experiments.　As　a　result　we　have　confirmed　that　we　can　achieve　our　objective.
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  • Process　Optimization　of　a　WaveSoldering by　Parameter　design
    Shinchi Kazashi, lsamu Miyazaki
    1993Volume 1Issue 3 Pages 25-32
    Published: August 15, 1993
    Released on J-STAGE: March 24, 2016
    DOIhttps://doi.org/10.18890/qes.1.3_25
    JOURNAL FREE ACCESS
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    With　the　advancement　of　electronic　and　electrical　components,　higher　density　printed　circuit boards　are　on　the　way.　ln　order　to　competitive,　it　is　essential　to　optimize　the　robust　functions　for　future　boards.　ln　the　past,　we　have　been　using　quality　characteristics　such　as　"Bridge"　and "Non　-　soldering"　to　evaluate　performance　of　soldering. This　time,　we　have　conducted　a　parameter　design　to　study　the　robustness　of　basic　function　of　soldering　process.　We　were　able　to　develop　technology　for　future　soldering　process.　The　details　are　reported　hereafter.
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