ISO 3951-1:2005 Sampling procedures for inspection by variables - Part 1: Specification for single sampling plans indexed by acceptance quality limit (AQL) for lot-by-lot inspection for a single quality characteristic and a single AQL

Abbreviation
ISO 3951-1:2005
Valid from
7/04/2005

Information provider
Standards New Zealand
Author
International Organization for Standardization
Information type
ISO Standard
Format
PDF


Description

ISO 3951-1:2005 specifies an acceptance sampling system of single sampling plans for inspection by variables, in which the acceptability of a lot is implicitly determined from an estimate of the percentage of nonconforming items in the process, based on a random sample of items from the lot.

ISO 3951-1:2005 is primarily designed for application under the following conditions: where the inspection procedure is to be applied to a continuing series of lots of discrete products all supplied by one producer using one production process;

  • where only a single quality characteristic x of these products is taken into consideration, which must be measurable on a continuous scale;
  • where the measurement error is negligible, i.e. with a standard deviation no more than 10% of the process standard deviation;
  • where production is stable (under statistical control) and the quality characteristic x is distributed according to a normal distribution or a close approximation to the normal distribution;
  • where a contract or standard defines an upper specification limit U, a lower specification limit L, or both;
  • an item is qualified as conforming if and only if its measured quality characteristic x satisfies the appropriate one of the following inequalities:
    • x greater than or equal to L;
    • x less than or equal to U.

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This resource is cited by:

ISO 3951-1:2005 Sampling procedures for inspection by variables - Part 1: Specification for single sampling plans indexed by acceptance quality limit (AQL) for lot-by-lot inspection for a single quality characteristic and a single AQL

This document is CITED BY:

ISO 3951-1:2005 Sampling procedures for inspection by variables - Part 1: Specification for single sampling plans indexed by acceptance quality limit (AQL) for lot-by-lot inspection for a single quality characteristic and a single AQL

Description

ISO 3951-1:2005 specifies an acceptance sampling system of single sampling plans for inspection by variables, in which the acceptability of a lot is implicitly determined from an estimate of the percentage of nonconforming items in the process, based on a random sample of items from the lot.

ISO 3951-1:2005 is primarily designed for application under the following conditions: where the inspection procedure is to be applied to a continuing series of lots of discrete products all supplied by one producer using one production process;

  • where only a single quality characteristic x of these products is taken into consideration, which must be measurable on a continuous scale;
  • where the measurement error is negligible, i.e. with a standard deviation no more than 10% of the process standard deviation;
  • where production is stable (under statistical control) and the quality characteristic x is distributed according to a normal distribution or a close approximation to the normal distribution;
  • where a contract or standard defines an upper specification limit U, a lower specification limit L, or both;
  • an item is qualified as conforming if and only if its measured quality characteristic x satisfies the appropriate one of the following inequalities:
    • x greater than or equal to L;
    • x less than or equal to U.

View on Information Provider website
ISO 3951-1:2005 Sampling procedures for inspection by variables - Part 1: Specification for single sampling plans indexed by acceptance quality limit (AQL) for lot-by-lot inspection for a single quality characteristic and a single AQL
Description

ISO 3951-1:2005 specifies an acceptance sampling system of single sampling plans for inspection by variables, in which the acceptability of a lot is implicitly determined from an estimate of the percentage of nonconforming items in the process, based on a random sample of items from the lot.

ISO 3951-1:2005 is primarily designed for application under the following conditions: where the inspection procedure is to be applied to a continuing series of lots of discrete products all supplied by one producer using one production process;

  • where only a single quality characteristic x of these products is taken into consideration, which must be measurable on a continuous scale;
  • where the measurement error is negligible, i.e. with a standard deviation no more than 10% of the process standard deviation;
  • where production is stable (under statistical control) and the quality characteristic x is distributed according to a normal distribution or a close approximation to the normal distribution;
  • where a contract or standard defines an upper specification limit U, a lower specification limit L, or both;
  • an item is qualified as conforming if and only if its measured quality characteristic x satisfies the appropriate one of the following inequalities:
    • x greater than or equal to L;
    • x less than or equal to U.
View on Information Provider website
This resource does not cite any other resources.

ISO 3951-1:2005 Sampling procedures for inspection by variables - Part 1: Specification for single sampling plans indexed by acceptance quality limit (AQL) for lot-by-lot inspection for a single quality characteristic and a single AQL

This resource does not CITE any other resources.
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