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This practice establishes tables and procedures for applying five different types of continuous sampling plans for inspection by attributes using MIL-STD-1235B as a basis for sampling a steady stream of lots indexed by AQL. This practice represents a conversion of MIL-STD1235B to an ASTM-supported standard.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
Significance and Use
4.1 The reason for preserving military sampling standards is that many organizations throughout the world still use these standards in their current form. MIL-STD-1235B is no longer supported by the U.S. Department of Defense as of the mid-1990s and is out of print, but does exist in the public domain. This practice represents a conversion of MIL-STD-1235B to an ASTM-supported standard.
4.2 This practice provides the tables and procedures for applying five different types of continuous sampling plans for inspection by attributes. These continuous sampling plans are discussed in Sections of this practice and each section includes information on:
(a) Initiation of 100 % inspection in use.
(b) Requirements on when to switch to sampling inspection.
(c) Conditions warranting a return to 100 % inspection.
(d) When a change in Code Letter, if desired, can be made.
(e) What to do when the checking inspector finds a defect that was originally found conforming by the screening inspector(s), that is, ineffective screening.
(f) Situations where a defect is found before the switch to 100 % inspection causing excessive periods of 100 % inspection so action must be taken, that is, long periods of screening.
4.2.1 Section (Section 2 in MIL-STD-1235B) describes specific procedures and applications of the CSP-1 sampling plans—a single-level continuous sampling procedure which provides for alternating between sequences of 100 % inspection and sampling inspection.
4.2.2 Section (Section 3 in MIL-STD-1235B) describes specific procedures and applications of the CSP-F sampling plans—a variation of the CSP-1 plans in that CSP-F plans are applied to a relatively short run of product, thereby permitting smaller clearance numbers to be used.
4.2.3 Section (Section 4 in MIL-STD-1235B) describes specific procedures and applications of the CSP-2 sampling plans—a modification of CSP-1 in that 100 % inspection resumes only after a prescribed number of defect-free units separate any two defective sample units.
4.2.4 Section (Section 5 in MIL-STD-1235B) describes specific procedures and applications of the CSP-T sampling plans—a multi-level continuous sampling procedure which provides for reducing the sampling frequency upon demonstration of superior product quality.
4.2.5 Section (Section 6 in MIL-STD-1235B) describes specific procedures and applications of the CSP-V sampling plans—a single-level continuous sampling procedure which is an alternative to CSP-T in that these plans provide for reducing the clearance number in good quality situations where reduction of sampling frequency has no economic merit.
1.1 This practice establishes tables and procedures for applying five different types of continuous sampling plans for inspection by attributes using MIL-STD-1235B as a basis for sampling 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 and others. It recognizes the continuing usage of MIL-STD-1235B in industries supported by ASTM. Most of the original text in MIL-STD-1235B is preserved in Sections of this practice.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
E456 Terminology Relating to Quality and Statistics
E1994 Practice for Use of Process Oriented AOQL and LTPD Sampling Plans
E2234 Practice for Sampling a Stream of Product by Attributes Indexed by AQL
Military StandardsMIL-STD-1235A1 Functional Curves of the Continuous Sampling Plans MIL-STD-1235B Single- and Multi-Level Continuous Sampling for Attributes
ICS Number Code 03.120.30 (Application of statistical methods)
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ASTM E2819-11(2015), Standard Practice for Single- and Multi-Level Continuous Sampling of a Stream of Product by Attributes Indexed by AQL, ASTM International, West Conshohocken, PA, 2015, www.astm.orgBack to Top