ASTM_B_697_-_88_2016.pdf

Designation:B69788(Reapproved 2016)Standard Guide forSelection of Sampling Plans for Inspection ofElectrodeposited Metallic and Inorganic Coatings1This standard is issued under the fixed designation B697;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 This guide gives guidance in the selection of samplingplans to be used in the inspection of electrodeposited andrelated coatings on products for the purpose of decidingwhether submitted lots of coated products comply with thespecifications applicable to the coatings.This supplements TestMethod B602 by giving more information on sampling inspec-tion and by providing additional sampling plans for the userwho finds the limited choice of plans in Test Method B602 tobe inadequate.1.2 When using a sampling plan,a relatively small part ofthe articles in an inspection lot is selected and inspected.Basedon the results,a decision is made that the inspection lot eitherdoes or does not satisfactorily conform to the specification.1.3 This guide also contains several sampling plans.Theplans are attribute plans,that is,in the application of the planseach inspected article is classified as either conforming ornonconforming to each of the coating requirements.Thenumber of nonconforming articles is compared to a maximumallowable number.The plans are simple and relatively few.Additional plans and more complex plans that cover moresituations are given in the Refs(1-7)at the end of this guideand in MIL-STD-105.1.4 Acceptance sampling plans are used:1.4.1 When the cost of inspection is high and the conse-quences of accepting a nonconforming article are not serious.1.4.2 When 100%inspection is fatiguing and boring and,therefore,likely to result in errors.In these cases a samplingplan may provide greater protection than 100%inspection.1.4.3 When inspection requires a destructive test.Here,sampling inspection must be used.1.5 Another general type of acceptance sampling plan that isnot covered in these guidelines is the variables plan in whichmeasured values of characteristics are analyzed by statisticalprocedures.Such plans,when applicable,can reduce inspec-tion cost and increase quality protection.Information onvariables plans is given in Test Method B762,MIL-STD-414,ANSI/ASQC Z1.9-1979,and Refs(1-2).2.Referenced Documents2.1 ASTM Standards:2B602 Test Method for Attribute Sampling of Metallic andInorganic CoatingsB762 Test Method of Variables Sampling of Metallic andInorganic Coatings2.2 ANSI Standard:3ANSI/ASQC Z1.9-1979 Sampling Procedures and Tablesfor Inspection by Variables for Percent Nonconformance2.3 Military Standards:4MIL-STD-105 Sampling Procedures and Tables for Inspec-tion by AttributesMIL-STD-414 Sampling Procedures and Tables for Inspec-tion by Variables for Percent Defective3.General3.1 ProcedureThe use of acceptance sampling consists ofa series of decisions and actions.These are listed in orderbelow and are discussed in this standard.3.1.1 Select characteristics to be inspected,3.1.2 Select type of sampling plan,3.1.3 Select quality level,3.1.4 Define inspection lot,3.1.5 Select sample,3.1.6 Inspect sample,3.1.7 Classify inspection lot,and3.1.8 Dispose of inspection lot.3.2 The need for acceptance sampling arises when a deci-sion must be made about what to do with a quantity of articles.1This guide is under the jurisdiction of ASTM Committee B08 on Metallic andInorganic Coatings and is the direct responsibility of Subcommittee B08.10 on TestMethods.Current edition approved Nov.1,2016.Published November 2016.Originallyapproved in 1981.Last previous edition approved in 2010 as B697 88(2010).DOI:10.1520/B0697-88R16.2For 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 American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from Standardization Documents Order Desk,DODSSP,Bldg.4,Section D,700 Robbins Ave.,Philadelphia,PA 19111-5098.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 This quantity(called the inspection lot in this guide)may be ashipment from a supplier,may be articles that are ready for asubsequent manufacturing operation,or may be articles readyfor shipment to a customer.3.3 When acceptance sampling is done,several of thearticles in the inspection lot are selected at random(see Section7).These articles constitute the sample.Each article in thesample is inspected for conformance to the requirementsplaced on it.If an article meets a requirement,it is classified asconforming.If not,it is classified