常用抽样检验计划精.ppt
常用抽样检验计划第1页，本讲稿共17页前言前言l产业界沿用已久之MIL-STD-105E表，当可被接受的不良率由%等级演变到PPM等级时，此套抽样计划逐渐被取代。l汽车业界使用之TS16949规定：计数型的抽样，其接受的等级必须是零缺点。l常见以下抽样方式，取代STD-105E表：C=0抽样计划表MIL-STD-1916所提供之抽样计划表第2页，本讲稿共17页MIL-STD-105E第3页，本讲稿共17页MIL-STD-105E第4页，本讲稿共17页TS16949第5页，本讲稿共17页C=0 抽样计划抽样计划某公司第6页，本讲稿共17页两者之两者之OC Curveln=200,Ac=3,Re=4ln=68,Ac=0,Re=1AQL=0.65STD-105E抽样计划表C=0抽样计划表第7页，本讲稿共17页两者之两者之OC CurveAQL=0.065 n=200,Ac=0,Re=1第8页，本讲稿共17页MIL-STD-19161.SCOPE2.APPLICABLE DOCUMENTS3.DEFINITIONS4.GENERAL REQUIREMENTS5.DETAILED REQUIREMENTS6.NOTES第9页，本讲稿共17页MIL-STD-19164.GENERAL REQUIREMENTS4-1 Acceptance by contractor-proposed provisions4-2 Acceptance by table4-3 Disposition of nonconforming product4-4 Critical characteristics4-5 Special reservations for critical nonconforming第10页，本讲稿共17页MIL-STD-19164-1 Acceptance by contractor-proposed provisions 4-1-1 GeneralRequires the contractor to performsampling inspectionin accordance with paragraph 4.2 and theproduct specification.When properproductand process designandprocess controlactivities are effective,sampling inspection is aredundanteffort and anunnecessarycost.Contractors are encouraged to consider submittingalternate acceptance methodsfor one or more characteristics.4-1-2 Requirements and Procedures Contractors quality systems in according withMIL-Q-9858 enhanced with SPC,ANSI/ASQC Q9004are qualified to apply for alternate acceptance methods.The current minimum values of process capability are equivalent to aCpkof2.00 for critical characteristics,1.33 for major characteristics,1.00 for minor characteristics 4-1-3 Submission and incorporation 4-1-4 Withdrawal of approval of alternates 第11页，本讲稿共17页MIL-STD-19164-2 Acceptance by table4-2-1 Preferred sampling plansthis standard establishesthree setsof matched sampling plans,inspect the samplesfrom lotsbyattributesorvariables measurementand forcontinuous samplingbyattributes measurement.the three sets are indexed bysevenspecified verification levels(VL)and five code letters(CL),which are determined by the lot or production interval size.4-2-2 Formation and identification of lots or batches4-2-3 Determination of sampling plan a.VL as specified.b.Type of sampling(attributes,variables,or continuous)c.Lot size CL from table Id.Switching procedure4-2-4 Sampling of lots or batches第12页，本讲稿共17页MIL-STD-1916第13页，本讲稿共17页MIL-STD-1916(计数型计数型)第14页，本讲稿共17页 MIL-STD-1916 OC CurveVL=III CL=E n=80VL=IV CL=E n=192VL=V CL=D n=384Lot size54419216100ppm时,Pa仅96%2%时,Pa尚有20%第15页，本讲稿共17页MIL-STD-1916(计量型计量型)第16页，本讲稿共17页MIL-STD-1916(连续型连续型)第17页，本讲稿共17页
