考慮多品質特性製程之計量抽樣計劃

Abstract

允收抽樣計劃在品質管制的應用中是相當重要的工具之一，它是在產品訂購的品質契約上，品質保證應用的實務工具。抽樣計劃提供了生產者和消費者對於產品是否接受或拒絕的決策準則，同時也可降低生產者所提供之產品品質、數量與訂單數量之間的差異。根據現今的品質改善理論，產品製程良率涉及一種以上之品質特性是相當普遍的，因此本研究提出了製程能力指標 的計量抽樣計劃來處理多品質特性製程之產品允收決策準則，而工程師或實務界可以利用本研究所提出之方法來決定所需檢驗之樣本數及產品允收之臨界值，並做出可靠有效之決策。在本研究的最後，我們利用一個實例來說明如何建構允收抽樣計劃之操作程序及應用。

Acceptance sampling plans have been one of the most practical tools used in classical quality control applications. It is a practical tool for quality assurance applications involving quality contract on product orders. The sampling plans provide the vendor and buyer decision rules for product acceptance to meet the present product quality requirement. A well-designed sampling plan can effectively reduce the difference between the actual supply quantity and order quantity. According to today’s modern quality improvement theory, the manufactured product involving more than one quality characteristic is quite common. Therefore, in this paper, we introduce a new variables sampling plan based on process capability index to deal with product acceptance determination for multiple characteristics. Practitioners can use the proposed method to determine the number of required in section units, the critical acceptance value, and make reliable decisions in product acceptance. At the end, a case study is also presented to illustrate how the proposed procedure can be constructed and applied to the real applications.