• UNI ISO 3951-2 : 2014

    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

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    Published date:  05-11-2014

    Publisher:  Ente Nazionale Italiano di Unificazione (UNI)

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    Table of Contents - (Show below) - (Hide below)

    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

    Abstract - (Show below) - (Hide below)

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

    General Product Information - (Show below) - (Hide below)

    Committee CT 16
    Document Type Standard
    Publisher Ente Nazionale Italiano di Unificazione (UNI)
    Status Current
    Supersedes

    Standards Referencing This Book - (Show below) - (Hide below)

    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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