SPC方法简介

SwireBeveragesSPC2002/08/20SwireBeverages.“”SwireBeveragesSwireBeveragesSwireBeverages304050SwireBeveragesSwireBeverages.SwireBeverages.SwireBeverages——SwireBeveragesSPCSPCSStatisticalPProcessCControlSwireBeveragesSwireBeveragesAABBDDCCSwireBeveragesSPCSwireBeverages-6-4-202461234567891011121SwireBeveragesSPCSwireBeveragesSPC1920WalterA.Shewhart80SwireBeverages1.2.3.4.1.2.3.4.SwireBeveragesSwireBeveragesOperatingontargetwithminimumvariabilitySwireBeveragesClassIntervalWidth(w)StartValue(CS)ClassInterval#nUpperBoundary(CB#n)SwireBeverages-2σµ+1σ+2σ+3σ-3σ-1σ0.1%2.2%13.7%34%34%13.7%0.1%“LARGE”DEVIATIONS“LARGE“EXPECTED”RANGEOFDATA68%95%σσ2.2%”DEVIATIONS99.7%SwireBeveragesX=X=i=1i=1XXiinnnnSwireBeveragesnni=1i=1XXiiX)X)22σσnn11SwireBeveragesXXX-X(X-X)210.40.60.36-20.4-2.45.7610.40.60.3610.40.60.3620.41.62.56-10.4–1.41.9600.4-0.40.1610.40.60.3600.4–0.40.16012.4σ=12.49=1.174SwireBeverages33σσ33σσ33σσ33σσSwireBeveragesxxxxSwireBeveragesSwireBeveragesSwireBeveragesSwireBeveragesSwireBeverages66,,BBB=6B=6σσSwireBeveragesCCppCp=T/BCp=T/B(Tu(Tu--Tl)/(6Tl)/(6σσ))SwireBeveragesBBTlTlTuTu33σσ33σσTTSwireBeveragesCp1.671.33Cp1.671.33--1.6711.671--1.330.671.330.67--10.6710.67SwireBeveragesCp1.33Cp5.33SwireBeverages33σσ33σσTuTuTlTlBBTTXSwireBeveragesCalculatedas:CPK=Z(minimum)3Z(upper)=USL–ProcessAverageσZ(lower)=ProcessAverage–LSLσCpkSwireBeveragesCp=CpkSwireBeveragesCpCpkSwireBeveragesCpk0SwireBeverages33σσ33σσSwireBeverages-8-6-4-2024681234567891011121314151617181920SwireBeverages-4-3-2-1012341234567891011121314SwireBeverages-4-3-2-1012341234567891011121314151617181920SwireBeverages-4-3-2-1012341234567891011121314151617181920SwireBeverages-4-3-2-1012341234567891011121314151617181920SwireBeverages-5-4-3-2-10123451234567891011121314151617181920SwireBeverages-2.5-2-1.5-1-0.500.511.522.5123456789--XX-1.5-1-0.500.511.5123456789SSSwireBeverages-1.5-1-0.500.511.522.53123456789X-1.5-1-0.500.511.5123456789XSSSwireBeverages-2.5-2-1.5-1-0.500.511.522.5123456789-1.5-1-0.500.511.522.533.5123456789--XXSSSwireBeverages•Ppk—PpkSwireBeveragesUSL–X3SX–LSL3SPpk=SwireBeverages-4-3-2-101234512345678910111213141516171819SwireBeverages•Ppk1.00SwireBeveragesSPC