常用抽样检验计划.ppt

常用之抽样计划介绍 从MIL-STD105E到MIL-STD-1916 前言 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。 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。 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 MIL-STD-105E MIL-STD-105E TS16949 C=0 抽样计划 两者之OC Curve n=200, Ac=3, Re=4 两者之OC Curve MIL-STD-1916 SCOPE APPLICABLE DOCUMENTS DEFINITIONS GENERAL REQUIREMENTS DETAILED REQUIREMENTS NOTES MIL-STD-1916 4. GENERAL REQUIREMENTS 4-1 Acceptance by contractor-proposed provisions 4-2 Acceptance by table 4-3 Disposition of nonconforming product 4-4 Critical characteristics 4-5 Special reservations for critical nonconforming MIL-STD-1916 4-1 Acceptance by contractor-proposed provisions 4-1-1 General Requires 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 MIL-STD-1916 4-2 Acceptance by table 4-2-1 Preferred sampling plans this 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 batches 4-2-3 Determination of sampling