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研究生: 鄭鈞遠
Cheng, Chun-Yuan
論文名稱: 捲積管制圖之設計
The design of the convolution chart
指導教授: 楊素芬
學位類別: 碩士
Master
系所名稱: 商學院 - 統計學系
Department of Statistics
論文出版年: 2011
畢業學年度: 99
語文別: 英文
論文頁數: 85
中文關鍵詞: 管制圖高良率製程量測誤差捲積
外文關鍵詞: control chart, high yield process, measurement error, convolution
相關次數: 點閱:332下載:8
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  • 量測誤差是工業製程中影響產品值常見的因素。大的量測誤差會使得產品的量測值偏離實際值,並引導監控者至錯誤的結論。本文提出一種新的捲積管制圖。提出指數分配形式的時間間隔型資料,並加上量測誤差的考量,應用在指數加權移動平均管制圖上。此外,假設量測誤差為常態或是指數分配。研究顯示出,在兩種不同分配的量測誤差之下,管制圖的表現都會顯著的受到影響。


    Measurement error is an important factor in industry that influences the outcome of a process. Large measurement error would cause the observation measure deviate from the true value and consequently lead to a wrong decision. In this project, we propose a convolution control chart. We then design the EWMA ‘time between events’ (TBE) control chart with the measurement error, with the assumption that the observations are exponentially distributed. In addition, we assumed the measurement error follows a normal distribution or an exponential distribution. We showed that, in two cases of the measurement error, the performance of the proposed chart monitoring the process mean is greatly affected.

    Table of Contents
    Chapter 1. Introduction……………………………………...………………...…….1
    1.1 Controlling High Yield Manufacturing Processes………………………...…….1
    1.2 Motivation and Objectives…………………………………………………..….2
    1.3 Literature Review……………………………………………………………….3
    Chapter 2. Performance Comparison Among the C Chart, CQC Chart, Transformed EWMA Chart and CQC EWMA Chart………………10
    2.1 Control Limits of Cumulative Quantity Control Chart, Transformed EWMA
    Chart and Cumulative Quantity Control EWMA Chart….……………………10
    2.2 An Example of the Cumulative Quantity Control Charts, Cumulative Quantity Control EWMA and Transformed EWMA Chart……………………………...12
    2.3 Average Run Length Analysis…………………………………………………15
    Chapter 3. The Design of the Convolution EWMA Chart with Normal Measurement Error…………………………………………………....18
    3.1 Measurement Error with Normal Distribution…………………………..…….18
    3.2 Design of the Exponential - Normal EWMA Convolution Chart……………..21
    3.3 Average Run Length of the Chart………………………………………..…….21
    3.4 Average Run Length Calculation………………………………………….......23
    3.5 The Impact of the Mistaking of the Chart……………………………….…….47
    Chapter 4. The Design of the EWMA Convolution Chart with Exponential Measurement Error……………………………………………….......51
    4.1 Measurement Error with Exponential Distribution…………………..………..51
    4.2 Design of the Exponential - Exponential EWMA Convolution Chart…..…….52
    4.3 Average Run Length of the Exponential-Exponential EWMA Convolution
    Chart …………………………………………………………………………..53
    4.4 The Impact of the Mistaking of the Chart……………………………………..77
    Chapter 5. Conclusion and Future Researches…………………...………………83
    Reference…………………………………………………………………………….85

    Reference
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