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UNI ISO 3951-2 : 2014

Current

Current

The latest, up-to-date edition.

SAMPLING PROCEDURES FOR INSPECTION BY VARIABLES - PART 2: GENERAL SPECIFICATION FOR SINGLE SAMPLING PLANS INDEXED BY ACCEPTANCE QUALITY LIMIT (AQL) FOR LOT-BY-LOT INSPECTION OF INDEPENDENT QUALITY CHARACTERISTICS

Published date

11-06-2014

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Acceptance quality limit (AQL)
6 Switching rules for normal, tightened, and
   reduced inspection
7 Relation to ISO 2859-1 and ISO 3951-1
8 Consumer protection
9 Accommodating measurement variability
10 Planning
11 Choice between variables and attributes
12 Choice between the s-method and sigma-method
13 Choice of inspection level and AQL
14 Choice of sampling scheme
15 Preliminary operations
16 Standard procedures for the univariate s-method
17 Standard multivariate s-method procedures for
   independent quality characteristics
18 Standard univariate sigma-method procedures
19 Standard multivariate sigma-method procedures for
   independent quality characteristics
20 Standard multivariate combined s-method and
   sigma-method procedures for independent quality
   characteristics
21 Procedure during continuing inspection
22 Normality and outliers
23 Records
24 Operation of switching rules
25 Discontinuation and resumption of inspection
26 Switching between the s-method and sigma-method
Annex A (normative) - Table for determining the sample
        size code letter
Annex B (normative) - Form k single sampling plans:
        s-method
Annex C (normative) - Form k single sampling plans:
        sigma-method
Annex D (normative) - Form p* single sampling plans:
        s-method
Annex E (normative) - Form p* single sampling plans:
        sigma-method
Annex F (normative) - Values of f[s] for maximum sample
        standard deviation (MSSD)
Annex G (normative) - Values of f[sigma] for maximum
        process standard deviation (MPSD)
Annex H (normative) - Estimating the process fraction
        nonconforming for sample size 3: s-method
Annex I (normative) - Values of c[U] for upper control limit
        on the sample standard deviation
Annex J (normative) - Supplementary acceptability constants
        for qualifying towards reduced inspection
Annex K (normative) - Procedures for obtaining s and sigma
Annex L (normative) - Estimating the process fraction
        nonconforming
Annex M (informative) - Consumer's risk qualities
Annex N (informative) - Producer's risks
Annex O (informative) - Operating characteristics for
        the sigma-method
Annex P (informative) - Accommodating measurement variability
Bibliography

This part of ISO 3951 specifies an acceptance sampling system of single sampling plans for inspection by variables.

Committee
CT 16
DocumentType
Standard
PublisherName
Ente Nazionale Italiano di Unificazione (UNI)
Status
Current
Supersedes

Standards Relationship
ISO 3951-2:2013 Identical

ISO 3951-1:2013 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
ISO 16269-4:2010 Statistical interpretation of data Part 4: Detection and treatment of outliers
ISO 7870:1993 Control charts General guide and introduction
ISO 10576-1:2003 Statistical methods — Guidelines for the evaluation of conformity with specified requirements — Part 1: General principles
ISO 2859-2:1985 Sampling procedures for inspection by attributes — Part 2: Sampling plans indexed by limiting quality (LQ) for isolated lot inspection
MIL-STD-414 Base Document:1957 SAMPLING PROCEDURE AND TABLE FOR INSPECTION BY VARIABLES FOR PERCENT DEFECTIVE
ISO 16269-6:2014 Statistical interpretation of data — Part 6: Determination of statistical tolerance intervals
ISO 3534-2:2006 Statistics Vocabulary and symbols Part 2: Applied statistics
ISO 80000-2:2009 Quantities and units Part 2: Mathematical signs and symbols to be used in the natural sciences and technology
ISO 2859-10:2006 Sampling procedures for inspection by attributes Part 10: Introduction to the ISO 2859 series of standards for sampling for inspection by attributes
ISO 5725-2:1994 Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
ISO 3534-1:2006 Statistics — Vocabulary and symbols — Part 1: General statistical terms and terms used in probability

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