SPCTRAININGSPC

統計制程控制StatisticalAnythingthatdealswiththecollection,analysis,interpretation&presentationofnumericaldataGaininginformationformakinginformeddecisionsProcessCombinationofmachines,tools,methods,materials&peopleemployedtoattainprocessspecificationAsimilarprocedure/eventthatishappeningrepetitivelyControlTokeepsomethingwithinadesiredconditionMakesomethingbehavethewaywewantittobehaveTheuseofstatisticaltechniquessuchascontrolchartstoanalyzeaprocess,takeappropriateactionstoachieve&maintainastableprocess,&improveprocesscapability.1SPCTRAININGClassificationsofcontrolchartsaredependingonthetypeofdataVariablesdataAcharacteristicmeasuredonacontinuousscaleresultinginanumericalvalueExamples:WirePull,BallShearStrength,Coplanarity,BallHeight,etc.AttributesdataAcharacteristicmeasuredby#ofconforming&non-conformingtoaspecification.Outputisclassifiedaspass/failoraccept/reject.E.g.BrokenWire,LiftedBond,FM,Chipping,BentLead,etc.Canbeexpressedintermsoffraction,percentage,countorDPMClassificationsofcontrolcharts2ControlChartConsistsofTwoPortions:XChartPlotsthemeanoftheXvaluesinthesampleShowsthechangesofthemeanofonesampletoanotherRChartPlotstherangeofasampleShowsthechangesindispersionorprocessvariabilityofonesampletoanother3ControlChartSymbolDescriptionSampleSizeX-RXMeanofSampleMustBeEqual(Mean-Range)ChartRRangeofSampleMustBeEqualX(IndividualChart)XIndividualMeasurementOneX-S(Mean-StandardXMeanofSampleMustBeEqualDeviation)ChartSStandardDeviationofSampleMustBeEqualControlChartsForVariables4ControlChartsForAttributes5Whentousedifferentcontrolchart(Guidelinesonly)

ControlChart

WhentoUse(Guidelinesonly)?

X-R

-whensubgroupingofsamplesor

(Mean-Range)Chart

measurementsisapplicable

-n<10

X

-whensubgroupingisnotapplicable

(Individual)

duetosingleunitreadingmaytake

Chart

alongtime,unitreadingisextremely

expensive,etc.

-whenit'scommontohavesingle

measurementspacedtimeapart

X-S

-whensubgroupingofsamplesor

(Mean-Standard

measurementsisapplicable

Deviation)Chart

-n>106SPCTRAINING

按照CONTROLPLAN上規定,如WIREPULLTEST:Once/shift,andafterdevicechange,capillarychange,andaftermachinerepair;10WIRES/UNIT.XBar&RCHART.何時/如何收集數據7如何計算平均值,極差XBAR&RCHART參數計算

對于k組樣本,每組抽樣量均為n的數據

Xi=(X1+X2+….Xn)/n(i=1~k)Ri=Xmax-Xmin (i=1~k)

XBARCHART的中心線(CENTERLINE)Xbarbar=(Xbar1+Xbar2+…Xbark)/KRCHART的中心線(CENTERLINE)

Rbar=(R1+R2+…Rk)/k

8對于XBARCHART的控制線

UCL/LCL=Xbarbar+/-3sigma對于RCHART的控制線

UCL/LCL=Rbar+/-3sigma*進行控制線計算時，至少已收集了25組數據。Ppk=(USL-Xbarbar)/3SorPpk=(USL-Xbarbar)/3S取較小者XBAR&RCHART的控制線&PPK9如何繪制在XBAR-R圖表

按收集的X，R的數據，計算每組的Xi和Ri，根據控制線確定在XBAR-RCHART圖上的位置，點上點，然后連線。104.SPC判斷原原則為為哪些些UpperControlLimit(UCL)CenterLine(CL)LowerControlLimit(LCL)11有一點點落在在控制制界限限外；；UpperControlLimit(UCL)CenterLine(CL)LowerControlLimit(LCL)12有連續續的7點遞增增或遞遞減UpperControlLimit(UCL)CenterLine(CL)LowerControlLimit(LCL)13有連續續的7點位于于中心心線同同側UpperControlLimit(UCL)CenterLine(CL)LowerControlLimit(LCL)14有明顯顯的非非隨機機圖形形的出出現；；15發生OOC時,如何處處理停止處處于失失控狀狀態的的機器器的生生產按照OCAP的指示示進行行相應應的處處理重新測測數據據，直直到新新的數數據得得到控控制，，才能能繼續續生產產16通過QI監控OOC17WARNINGS:Group/Summarywillsortthenewtableinalphabeticalorderofthegroupingvariable.Controlchartsmustalwaysbeplottedintimeorder.Therefore,ifthesummarytableisnotintimeorder,youwillhavetosortthetableincorrecttimeorderbeforemakingthecontrolchart.LCL(R)=0ExampleofComputingControlLimitsfor