ISO 3951-1:2022

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

General information
Valid from 18.08.2022
Directives or regulations

Standard history

This document specifies single sampling plans for lot-by-lot inspection under the following conditions:
a) where the inspection procedure is applied to a continuing series of lots of discrete products, all supplied by one producer using one production process;
b) where only a single quality characteristic, x, of these products is taken into consideration, which is measurable on a continuous scale;
c) where production is under statistical control and the quality characteristic, x, is distributed according to a normal distribution or a close approximation to the normal distribution;
d) where a contract or standard defines a lower specification limit, L, an upper specification limit, U, or both. An item is qualified as conforming if its measured quality characteristic, x, satisfies as appropriate one of the following inequalities:
1)    x ≥ L (i.e. the lower specification limit is not violated);
2)    x ≤ U (i.e. the upper specification limit is not violated);
3)    x ≥ L and x ≤ U (i.e. neither the lower nor the upper specification limit is violated).
Inequalities 1) and 2) are cases with a single specification limit, and 3) is a case with double specification limits.
Where double specification limits apply, it is assumed in this document that conformity to both specification limits is equally important to the integrity of the product. In such cases, it is appropriate to apply a single AQL to the combined percentage of a product outside the two specification limits. This is referred to as combined control.
252.82 € incl tax
252.82 € incl tax
Standard monitoring

Customers who bought this item also bought


EVS-EN ISO 14644-8:2022

Cleanrooms and associated controlled environments - Part 8: Assessment of air cleanliness by chemical concentration (ACC) (ISO 14644-8:2022)
Newest version Valid from 15.07.2022
Main + amendment

EVS-EN IEC 61010-2-101:2022+A11:2022

Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-101: Safety requirements for in vitro diagnostic (IVD) medical equipment (IEC 61010-2-101:2018)
Newest version Valid from 01.12.2022

EVS-EN ISO 10993-1:2020

Biological evaluation of medical devices - Part 1: Evaluation and testing within a risk management process (ISO 10993-1:2018, including corrected version 2018-10)
Newest version Valid from 31.12.2020

EVS-EN ISO 11607-1:2020/A11:2022

Packaging for terminally sterilized medical devices - Part 1: Requirements for materials, sterile barrier systems and packaging systems (ISO 11607-1:2019)
Valid from 01.07.2022