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題 名 | Distributional Property of the Incapability Index C抅抅 Under Edgeworth Series Distribution for Processes with Symmetric Tolerances=製程能力指標C抅抅在Edgeworth分佈下之分配 |
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作 者 | 陳思勉; | 書刊名 | Fu Jen Studies. Science and Engineering |
卷 期 | 32 1998.12[民87.12] |
頁 次 | 頁69-78 |
分類號 | 319.9 |
關鍵詞 | 對稱容忍區間; 統計製程管制; Symmetric tolerance; Statistical process control; |
語 文 | 英文(English) |
中文摘要 | Greenwich and Jahr-Schaffrath(1995)提出製程能力指標 C�d�d。該製程能力指標可將製程準確度及製程精確度分開表之。該文中作者提出一個自然估計式並討論該製程能力指標在常態製程假設下之近似信賴區間。然而製程真正的分佈一般而言是未知的,因此在本文中我們探討當真正的製程分佈是非常態但是很靠近常態分佈時,不管其樣本大小如何,若真正的製程分佈可以Edgeworth series逼近時該自然估計式之分佈。 |
英文摘要 | Greenwich and jahr-Schaffrath (1995) introduced an incapability index C�d�dwhich provides an uncontaminated separation between information concerning process accuracy and process precision. They proposed a natural estimators and study approximate confidence interval of C�d�dfor both small and large samples under normality. Chen (1998) showed that such natural estimators are UMVUE under normality. However, the true distribution of measurements is never known exactly. In this article, regardless the sample sizes, by assuming the underlying process distributions are close to normal and can be approximated by Edgeworth series, the distribution of the natural estimator for processes with symmetric tolerance is derived. |
本系統中英文摘要資訊取自各篇刊載內容。