spc基本概念介紹-文庫吧資料
2025-02-23 01:21本頁面
【正文】 2 3 4 5 4Sinderella Liutabulatedandsizevaryingconstantisandsampleofthefollows:Centerline:Sinderella LiuR Chart : Upper and Lower control limitUpper Control Limit:Lower Control Limit:Where: RUpper and Lower control limitCenterlinerangeavailableofarithmeticisi’thRangeisofthektabulated2Sinderella LiuR Chart : Where:andsizevaryingconstantisrangesAtheaverageis:Sinderella LiuXsampleallaveragethesubgroupofmeanisofthekfollows:Centerline:Where:Upper and Lower control limitCenterlineStepCharteachMinvalueMaxdifferenceiseachvaluetheMeanSubgroupofand1:Calculate:Sinderella LiuXknTotalSize:Always Begin with R ChartcontrolintheChartTo?The mean level of the process?The amount of variation in the processAverageprocesstheinterestaretwo process characteristicsSinderella LiuTherespecialmonitor?AlarmControlrequired)?Centraldata(20~25Items?ControlCalculationwithinspecialoccurrence?Minimizemonsystemaonlyisrandom)?Groups(unbiasedCollection?Rational單位缺點數管制圖? 與 CChartUChart缺點數管制圖? 每單位數內缺點發(fā)生之次數 CChart相同，每組樣本需相同 NPChartPChart 中位數與全距管制圖? 與 相同，但檢出力較差 個別值與移動全距管制圖? 適用於找出不同 subgroup間之變化時 平均值與標準差管制圖? 與 相同，用於 subgroupiswe(say, k samples of size n each)ofaniswemethodcontrolthecontext ., statistically significant change.Sinderella Liu☆ Shewhart Control Chart Thinking:In 當觀測值超出管制界限時，通常表示製程應予以調整和矯正。當有可歸屬原因出現(xiàn)時，製程未在可接受水準。可歸屬變異可以被偵測出；消除該變異通常均合乎經濟原則。 當觀測值在管制界限內時，表示製程不應調整。當僅有機遇變異出現(xiàn)時，製程處於可接受水準；倘若仍有不合格品產生，則必需進行基本製程改變或修定規(guī)格，以減少不合格品。消除製程中之機遇變異不符合經濟原則。可能原因機器之微震原料之略微差異作業(yè)員之錯誤機器不正確之設定不合格原料 2. Cause)特性 。Cause)可歸屬原因 (特殊原因 )AssignablecontrolUSLLSLSinderella LiuAll processes are subject to two fundamental types of faults or problems. They are:類別機遇原因 (一般原因 )ChancecontrolOutofSinderella LiuLCLUCLCL? ? ?????Sinderella LiuUSLLSLUCLLCLUSLLSLUCLLCLUSLLSLUCLLCLUCLLCLIncontrolpopulation changes over timeSinderella LiuOutput DataOutput Data Output DataOutput DataOutput Datat1 t3 t4 t5t2Process MeanUpper Control LimitLower Control Limit☆ 將製程之品質特性以圖形之方式表示 ， 把量測所得之資料點繪製於以時間為橫軸之圖形上 。intransitionin search of a causal systemSinderella LiuProcess Evaluation Over TimeTimeProcesscontrolone unique causal systemSinderella LiuProcess Evaluation Over TimeTimeProcessinnumbershow aliketarget.PrecisiononnumbersisTime? ??????Wear? ???? ??AgingQualityusefield? ??????Temperature? ???? ??PowerQualityinResponseSinderella LiuConceptual Framework for SPCThe origins
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