An Effective Modern Approach for Measuring High-Tech Product Manufacturing Process Quality

評估高科技産品製程績效之有效方法

彭文理(W. L. Pearn) ； 吳建瑋(Chien-Wei Wu)

《工業工程學刊》 22卷2期 (2005/03) Pp. 119-133

https://doi.org/10.29977/JCIIE.200503.0003

摘要

近年來，隨著製程技術的快速進步，供應商不斷要求産品具有高品質的水凖以及相當低的産品不良率。然而，由於在這些高品質製程（不良品種通常用百萬分之一爲衡量單位）所取出適當大小的樣本中幾乎沒有不良品，因此傳統用來衡量這些低不良率製程的方法變得沒有效率且不適用。有鑑於此，本研究提出一個評估高科技産品製程品質水凖的有效方法，也就是利用製程能力指標來評估製程能力與産出績效。此外，本文亦針對一些實務上的推廣及應用情形提出討論與建議。因此，操作人員可以根據所提出的檢定程序簡單地判斷他們的製程是否達到指定所要求的製程能力水凖，以做爲衡量製程能力好壞及接單與否的重要參考。

關鍵字

臨界值 ； 産品不良率 ； 信賴下界 ； 百萬分之一 ； 製程能力指標

並列摘要

As rapid advancement of the manufacturing technology, suppliers require their products be high quality with very low fraction of nonconformities. Traditional methods for measuring fraction of nonconformities become inapplicable for those high quality processes since any manufacturing sample of reasonable size likely contains no defective product items. In this paper, we first comment on the classical approach, then present an effective modern approach based on process capability indices for measuring manufacturing process quality, specifically for high technology product requiring very low fraction of nonconformities (often measured in PPM, parts per million). In addition, several implementation issues and extensions are discussed. The manufacturers can use the presented approach to perform quality testing and determine whether their processes are capable for reproducing product items satisfying customers' stringent quality requirements.

並列關鍵字

critical values ； fraction of nonconformities ； lower confidence bound ； PPM ； process capability indices

參考文獻

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