ASTM E2819-11

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.

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 6-10 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.

Section 6 (Section 2 in MIL-STD-1235B) describes specific procedures and applications of the CSP-1 sampling plansa single-level continuous sampling procedure which provides for alternating between sequences of 100 % inspection and sampling inspection.

Section 7 (Section 3 in MIL-STD-1235B) describes specific procedures and applications of the CSP-F sampling plansa 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.

Section 8 (Section 4 in MIL-STD-1235B) describes specific procedures and applications of the CSP-2 sampling plansa modification of CSP-1 in that 100 % inspection resumes only after a prescribed number of defect-free units separate any two defective sample units.

Section 9 (Section 5 in MIL-STD-1235B) describes specific procedures and applications of the CSP-T sampling plansa multi-level continuous sampling procedure which provides for reducing the sampling frequency upon demonstration of superior product quality.

Section 10 (Section 6 in MIL-STD-1235B) describes specific procedures and applications of the CSP-V sampling plansa 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.