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題名 | 偏態校正方法之目標平均數管制圖的設計=The Design of Goal Average Control Chart through a Skewness Correction |
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作者 | 高世州; 李陽榮; Kao, S. C.; Li, Y. J.; |
期刊 | 危機管理學刊 |
出版日期 | 20090300 |
卷期 | 6:1 2009.03[民98.03] |
頁次 | 頁79-86 |
分類號 | 494.542 |
語文 | chi |
關鍵詞 | 製程能力指標; 品質損失函數; 偏態校正; 管制圖; Process capability index; Quality loss function; Skewness correction; Control chart; |
中文摘要 | 近年來,製程能力指標(process capability index)與管制圖爲統計製程管制的重要工具之一,對於品質及生產力之改善有非常良好的效果。本研究利用製程能力指標結合損失函數與偏態校正(skewness correction)方法建構目標平均數管制圖,本研究所提出的管制圖較傳統管制圖更適合使用在偏態的製程上面;再者,因爲採取偏態校正的方法決定管制界限,因此本研究所提出的管制圖會有較低的型一錯誤(type I error)機率,並且也提供品質改善的目標建議。本研究以汽車風箱上蓋爲例,透過本研究所提出的方法評估產品製程,其結果顯示本研究的方法可協助企業改善產品品質、降低品質成本和提升市場競爭優勢。 |
英文摘要 | Process capability index and control chart are important tools in the statistical quality control and they have a good effectiveness on monitoring and improving a process. The study considers the process capability index, quality loss function and skewness correction method to conduct a goal control chart. The proposed control chart is more suitable to be used to monitor a non-normal process than a traditional control chart. Moreover, the proposed control chart has low type I error probabilities on monitoring a non-normal process since it employs skewness correction method to determine control limits and provides a goal suggestion of quality improvement. This study also considers the proposed goal control chart using the top of a motor evaporator. In the example, the goal standard deviation and control limits can help practitioners in making production decisions and improving a process. |
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