研究生: |
陳柔妤 |
---|---|
論文名稱: |
管制圖的製程失效機制及抽樣間隔之探討 |
指導教授: | 桑慧敏 |
口試委員: | |
學位類別: |
碩士 Master |
系所名稱: |
工學院 - 工業工程與工程管理學系 Department of Industrial Engineering and Engineering Management |
論文出版年: | 2004 |
畢業學年度: | 92 |
語文別: | 中文 |
論文頁數: | 59 |
中文關鍵詞: | 變動抽樣區間 、統計經濟設計管制圖 、GG3分配 、反應曲面 |
相關次數: | 點閱:2 下載:0 |
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中文摘要
近年來產品品質改善在工業界中已經變成重要的一環。當然,提昇產品品質與良率的方法有很多,其中製程管制則廣為業界所使用。在製程管制中通常是利用管制圖來進行監視,建立管制圖要先決定三個重要的參數,即抽樣樣本大小(n)、抽樣間隔(h)和管制界限(K)。管理者究竟要如何建立才能達到降低管制成本且有效的監控整體製程?
在本研究中為建立一變動抽樣區間之 統計經濟設計管制圖模型,其中製程失效機制分配為 分配。統計經濟管制圖設計一方面可使每小時期望淨收入最大化,(也就是將製程每小時期望損失最小),另一方面也可將製程異常判斷錯誤的機率限定在一個容忍的範圍內,若製程真正發生偏移時,能盡快找出異常點。本研究利用非線性規劃的反應曲面搜尋演算法來進行模型參數求解,並透過個案研究來加以分析與探討。
本論文的主要研究貢獻有下列兩點。第一、所建立的模型可運用在不同分配下的機器失效情況。決策者不需要費時間另建不同分配的模型。第二、若一作業環境中有多台機器設備時,可以利用該模型來同時進行分析與探討,對製程更能清楚掌握。
本論文的主要結果與發現為:( 1 ) 採用不同的製程失效分配, 分配的統計經濟管制圖的期望損失E(L)似乎較小;( 2 ) 經由兩個個案研究發現期望損失E(L)值與製程失效圖有關係存在。
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