ASTM B697-88(2021)
(Guide)Standard Guide for Selection of Sampling Plans for Inspection of Electrodeposited Metallic and Inorganic Coatings
Standard Guide for Selection of Sampling Plans for Inspection of Electrodeposited Metallic and Inorganic Coatings
ABSTRACT
This guide covers the standard method for selecting sampling plans to be used in the inspection of electrodeposited metallic and inorganic coatings on products for the purpose of deciding whether submitted lots comply with the specifications applicable to the coatings. The characteristics of the sampling plan are expressed in terms of the Acceptable Quality Level (AQL), Limiting Quality Level (LQL), Average Outgoing Quality (AOQ), and Average Outgoing Quality Limit (AOQL). General procedures and criteria for the construction and selection of the type of sampling plan, selection of a specific plan, selection of the inspection lot, sampling and inspection of samples, and the disposition of lots are discussed fully.
SCOPE
1.1 This guide gives guidance in the selection of sampling plans to be used in the inspection of electrodeposited and related coatings on products for the purpose of deciding whether submitted lots of coated products comply with the specifications applicable to the coatings. This supplements Test Method B602 by giving more information on sampling inspection and by providing additional sampling plans for the user who finds the limited choice of plans in Test Method B602 to be inadequate.
1.2 When using a sampling plan, a relatively small part of the articles in an inspection lot is selected and inspected. Based on the results, a decision is made that the inspection lot either does or does not satisfactorily conform to the specification.
1.3 This guide also contains several sampling plans. The plans are attribute plans, that is, in the application of the plans each inspected article is classified as either conforming or nonconforming to each of the coating requirements. The number of nonconforming articles is compared to a maximum allowable number. The plans are simple and relatively few. Additional plans and more complex plans that cover more situations are given in the Refs (1-7) at the end of this guide and in MIL-STD-105.
1.4 Acceptance sampling plans are used:
1.4.1 When the cost of inspection is high and the consequences 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 sampling plan 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 is not covered in these guidelines is the variables plan in which measured values of characteristics are analyzed by statistical procedures. Such plans, when applicable, can reduce inspection cost and increase quality protection. Information on variables plans is given in Test Method B762, MIL-STD-414, ANSI/ASQC Z1.9-1979, and Refs (1-2).
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: B697 − 88 (Reapproved 2021)
Standard Guide for
Selection of Sampling Plans for Inspection of
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Electrodeposited Metallic and Inorganic Coatings
This standard is issued under the fixed designation B697; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope procedures. Such plans, when applicable, can reduce inspec-
tion cost and increase quality protection. Information on
1.1 This guide gives guidance in the selection of sampling
variables plans is given in Test Method B762, MIL-STD-414,
plans to be used in the inspection of electrodeposited and
ANSI/ASQC Z1.9-1979, and Refs (1-2).
related coatings on products for the purpose of deciding
1.6 This international standard was developed in accor-
whether submitted lots of coated products comply with the
dance with internationally recognized principles on standard-
specificationsapplicabletothecoatings.ThissupplementsTest
ization established in the Decision on Principles for the
Method B602 by giving more information on sampling inspec-
Development of International Standards, Guides and Recom-
tion and by providing additional sampling plans for the user
mendations issued by the World Trade Organization Technical
who finds the limited choice of plans in Test Method B602 to
Barriers to Trade (TBT) Committee.
be inadequate.
1.2 When using a sampling plan, a relatively small part of
2. Referenced Documents
thearticlesinaninspectionlotisselectedandinspected.Based
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2.1 ASTM Standards:
on the results, a decision is made that the inspection lot either
B602 Test Method for Attribute Sampling of Metallic and
does or does not satisfactorily conform to the specification.
Inorganic Coatings
1.3 This guide also contains several sampling plans. The
B762 Test Method of Variables Sampling of Metallic and
plans are attribute plans, that is, in the application of the plans
Inorganic Coatings
each inspected article is classified as either conforming or
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2.2 ANSI Standard:
nonconforming to each of the coating requirements. The
ANSI/ASQC Z1.9-1979 Sampling Procedures and Tables
number of nonconforming articles is compared to a maximum
for Inspection by Variables for Percent Nonconformance
allowable number. The plans are simple and relatively few.
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2.3 Military Standards:
Additional plans and more complex plans that cover more
MIL-STD-105 Sampling Procedures and Tables for Inspec-
situations are given in the Refs (1-7) at the end of this guide
tion by Attributes
and in MIL-STD-105.
MIL-STD-414 Sampling Procedures and Tables for Inspec-
1.4 Acceptance sampling plans are used:
tion by Variables for Percent Defective
1.4.1 When the cost of inspection is high and the conse-
quences of accepting a nonconforming article are not serious. 3. General
1.4.2 When 100 % inspection is fatiguing and boring and,
3.1 Procedure—The use of acceptance sampling consists of
therefore, likely to result in errors. In these cases a sampling
a series of decisions and actions. These are listed in order
plan may provide greater protection than 100 % inspection.
below and are discussed in this standard.
1.4.3 When inspection requires a destructive test. Here,
3.1.1 Select characteristics to be inspected,
sampling inspection must be used.
3.1.2 Select type of sampling plan,
1.5 Anothergeneraltypeofacceptancesamplingplanthatis 3.1.3 Select quality level,
not covered in these guidelines is the variables plan in which
3.1.4 Define inspection lot,
measured values of characteristics are analyzed by statistical
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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This guide is under the jurisdiction of ASTM Committee B08 on Metallic and Standards volume information, refer to the standard’s Document Summary page on
Inorganic Coatings and is the direct responsibility of Subcommittee B08.10 on Test the ASTM website.
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Methods. Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
Current edition approved Oct. 1, 2021. Published October 2021. Originally 4th Floor, New York, NY 10036, http://www.ansi.org.
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approved in 1981. Last previous edition approved in 2016 as B697 – 88 (2016). Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
DOI: 10.1520/B0697-88R21. Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098.
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