ASTM_E_2762_-_10_2014.pdf

Designation:E276210(Reapproved 2014)An American National StandardStandard Practice forSampling a Stream of Product by Variables Indexed byAQL1This standard is issued under the fixed designation E2762;the number immediately following the designation indicates the 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 PurposeThis practice establishes lot or batch sam-pling plans and procedures for inspection by variables usingMIL-STD-414 as a basis for sampling a steady stream of lotsindexed by AQL.1.2 This practice provides the sampling plans of MIL-STD-414 in ASTM format for use by ASTM committees and others.It recognizes the continuing usage of MIL-STD-414 in indus-tries supported by ASTM.Most of the original text in MIL-STD-414 is preserved in Sections 6 9 of this practice.1.3 The values stated in inch-pound units are to be regardedas standard.No other units of measurement are included in thisstandard.1.4 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 standard 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 StatisticsE2234 Practice for Sampling a Stream of Product by Attri-butes Indexed by AQLE2586 Practice for Calculating and Using Basic Statistics2.2 Other Standards:3MIL-STD-414 Sampling Procedures and Tables for Inspec-tion by Variables for Percent DefectiveMIL-STD-105E Sampling Procedures and Tables for In-spection by Attributes3.Terminology3.1 Definitions:3.1.1For a more extensive list of terms in E11 standards,see Terminology 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.E22343.1.2.1 DiscussionThis definition supersedes that given inMIL-STD-105E and MIL-STD-414.3.1.3 classification of defects,nthe enumeration of pos-sible defects of the unit of product classified according to theirseriousness,that is,critical,major,or minor defect.E22343.1.4 critical defect,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.E22343.1.5 defect,nany nonconformance of the unit of productwith specified requirements.E22343.1.6 inspection,nthe process of measuring,examining,testing,or otherwise comparing the unit of product with therequirements.E22343.1.7 inspection by variables,ninspection wherein theunit of product is measured on a continuous scale with respectto a given requirement or set of requirements.3.1.8 inspection lot,na collection of units of productproduced under conditions that are considered uniform andfrom which a sample is drawn and inspected.E22343.1.9 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.E22343.1.10 minor defect,na defect that is not likely to reducematerially the usability of the unit of product for its intendedpurpose,or is a departure from established standards havinglittle bearing on the effective use or operation of the unit.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 April 1,2014.Published May 2014.Originallyapproved in 2010.Last previous edition approved in 2010 as E2762 10.DOI101520/E2762-10.2For 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 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 3.1.11 operating characteristic,nprobability of accep-tance using a specified acceptance sampling plan,as a functionof parameters describing quality of the lot.E22343.1.12 sample,na group of observations,test results,taken from a large collection of observations,test results,which serves to provide information that may be used as a basisfor making a decision concerning the larger collection.E25863.1.12.1 DiscussionA sample consists of one or moreunits of product drawn from an inspection lot,the units of thesample being selected at random without regard to theirquality.The number