累積和控制圖在企業(yè)質(zhì)量控制中的應(yīng)用(已修改)
2025-08-11 04:09 本頁(yè)面
【正文】 目 錄中文摘要………………………………………………………………………2英文摘要………………………………………………………………………2正文……………………………………………………………………………2一、引言………………………………………………………………………3二、休哈特控制圖……………………………………………………………3（一）休哈特控制圖原理和缺點(diǎn)……………………………………………3（二）不合格品率控制圖……………………………………………………4三、累積和控制圖…………………………………………………………..4（一）累積和控制圖的發(fā)展及使用條件…………………………………..4（二）累積和控制圖原理…………………………………………………..5（三）累積和控制圖參數(shù)選取方法………………………………………..8四、實(shí)證分析…………………………………………………………………10五、結(jié)束語(yǔ)……………………………………………………………………14參考文獻(xiàn)………………………………………………………………………15累積和控制圖在企業(yè)質(zhì)量控制中的應(yīng)用摘要：休哈特控制圖是區(qū)分過(guò)程中正常波動(dòng)和異常波動(dòng)，并判斷過(guò)程是否處于控制狀態(tài)的一種工具。但是，常規(guī)控制圖對(duì)生產(chǎn)過(guò)程是否異常的判斷，是以孤立的一次觀測(cè)結(jié)果為依據(jù)的，它對(duì)大偏移的檢出力極高，對(duì)小偏移的檢出力卻極低。累積和控制圖用“平均鏈長(zhǎng)”來(lái)控制兩類(lèi)錯(cuò)誤，對(duì)過(guò)程的判斷以歷次觀察結(jié)果為依據(jù)，對(duì)發(fā)現(xiàn)過(guò)程平均值的突然的微小的變化特別有用。因此，本文將通過(guò)對(duì)河北省河間市恒泰壓鑄件廠生產(chǎn)的鑄件數(shù)據(jù)分別應(yīng)用休哈特控制圖分析和累積和控制圖來(lái)判斷生產(chǎn)過(guò)程質(zhì)量特性值是否受控, 從而表明累計(jì)和控制圖對(duì)過(guò)程異常有更高的靈敏度，從而顯示出它的優(yōu)越性。關(guān)鍵詞：休哈特控制圖，累積和控制圖 ，序貫概率比檢驗(yàn)，平均鏈長(zhǎng)Abstract: Shewhart chart is a tool for distincting between normal and abnormal fluctuations in the process and determing whether the process is in control. However, The judgement of the Shewhart chart for whether the production process is normal, is based on the isolated result of the observation. Its Cpacity for detecting large shift is extremely high, but for the small shift is very low. Accumulative sum chart use averagelinked to control the two types of error, whose judgement for the process is based on the results of previous is very useful in detecting the sudden tiny changes of the process average. Therefore, according to the data from Hejian Hengtai Die Casting factory ,this paper will use Shewhart chart and Accumulative sum chart to analyze whether the property value of the quality in the production process is result will show that Accumulative sum chart has higher sensitivity in the abnormal process, thus demonstrate its superiority.Key words: Shewhart chart，Accumulative sum chart ， Sequential prob
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