1、Designation:E281911(Reapproved 2015)An American National StandardStandard Practice forSingle-and Multi-Level Continuous Sampling of a Stream ofProduct by Attributes Indexed by AQL1This standard is issued under the fixed designation E2819;the number immediately following the designation indicates the
2、 year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice establishes tables and procedures forapplyin
3、g five different types of continuous sampling plans forinspection by attributes using MIL-STD-1235B as a basis forsampling a steady stream of lots indexed by AQL.1.2 This practice provides the sampling plans of MIL-STD-1235B in ASTM format for use by ASTM committees andothers.It recognizes the conti
4、nuing usage of MIL-STD-1235Bin industries supported by ASTM.Most of the original text inMIL-STD-1235B is preserved in Sections 6 10 of thispractice.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this stand
5、ard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E456 Terminology Relating to Quality and StatisticsE1994 Practice for Use of Process Oriented AOQL andLTPD Sampling PlansE2234 P
6、ractice for Sampling a Stream of Product by Attri-butes Indexed by AQL2.2 Military Standards:3MIL-STD-1235A1 Functional Curves of the ContinuousSampling PlansMIL-STD-1235B Single-and Multi-Level Continuous Sam-pling for Attributes3.Terminology3.1 Definitions:3.1.1 For a more extensive list of terms
7、in E11 standards seeTerminology E456.3.1.2 acceptance quality limit(AQL),nquality limit that isthe worst tolerable process average when a continuing series oflots is submitted for acceptance sampling.E22343.1.3 average outgoing quality(AOQ),nthe average per-cent defective of outgoing product includi
8、ng all accepted lotsor batches after any defectives found in them are replaced byacceptable units,plus all lots or batches which are not acceptedafter such lots or batches have been effectively 100%in-spected and all defective units replaced by acceptable units.E19943.1.4 average outgoing quality li
9、mit(AOQL),nthe maxi-mum AOQ for a given acceptance sampling plan for allpossible incoming percentages defective for the process.E19943.1.5 continuous sampling inspection,na method of sam-pling a stream of product in order of production where thesampling frequency is adjusted based on ongoing inspect
10、ionresults.3.1.5.1 DiscussionOnly those units of product found bythe inspector or screening crew to be nonconforming arerejected.The rest of production,uninspected units as well asunits found to be conforming,is allowed to continue down theproduction line as conforming material.3.1.6 critical defect
11、,na defect that judgment and experi-ence indicate would result in hazardous or unsafe conditionsfor individuals using,maintaining,or depending upon theproduct,or a defect that judgment and experience indicate islikely to prevent performance of the function of a major enditem.E22343.1.7 critical defe
12、ctive,na unit of product which containsone or more critical defects and may also contain major andminor,or both,defects.E22343.1.8 defect,nany nonconformance of the unit of productwith specified requirements.E22343.1.9 inspection,nthe process of measuring,examining,testing,or otherwise comparing the
13、 unit of product with therequirements.E22341This practice is under the jurisdiction ofASTM Committee E11 on Quality andStatistics and is the direct responsibility of Subcommittee E11.30 on StatisticalQuality Control.Current edition approved May 15,2015.Published June 2015.Originallyapproved in 2011.
14、Last previous edition approved in 2011 as E2819 11.DOI:10.1520/E2819-11R15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM
15、 website.3Available from Standardization Documents Order Desk,DODSSP,Bldg.4,SectionD,700RobbinsAve.,Philadelphia,PA19111-5098,http:/dodssp.daps.dla.mil.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.10 inspection by attributes,ninspe
16、ction whereby ei-ther the unit of product is classified simply as defective ornon-defective,or the number of defects in the unit of productis counted,with respect to a given requirement or set ofrequirements.E22343.1.11 major defect,na defect,other than critical,that islikely to result in failure,or to reduce materially the usabilityof the unit of product for its intended purpose.E22343.1.12 major defective,na unit of product which containsone or more major defects,and may also contain minor def
