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ISO 28598-2:2017

(Main)

Acceptance sampling procedures based on the allocation of priorities principle (APP) — Part 2: Coordinated single sampling plans for acceptance sampling by attributes

Acceptance sampling procedures based on the allocation of priorities principle (APP) — Part 2: Coordinated single sampling plans for acceptance sampling by attributes

This part of ISO 28598 provides attributes sampling procedures and single sampling plans for successive independent inspections of the same lot conducted by the supplier, customer and/or a third party. This part of ISO 28598 addresses: - supplier inspection (final inspection, product certification upon supplier's request); - customer inspection (incoming inspection, surveillance, acceptance sampling); - third party inspection. This part of ISO 28598 may also be applicable when only one inspection is needed. A catalogue of single sampling plans is given, indexed by the normative quality limits (NQLs). This part of ISO 28598 provides sampling procedures for: - finished product; - components and discrete items; - operations; - discrete items and the processes that produce them; - data and records. Attributes sampling procedures are provided for inspection of an isolated lot or a continuing series of lots of a discrete product. These procedures are applicable when a normative quality limit (NQL) is given and expressed in terms of percent nonconforming or nonconformities per 100 items. This part of ISO 28598 provides a co-ordinated system of supplier, customer and third party acceptance sampling procedures. It is also applicable to the case where a supplier individually, or on agreement with a customer, in a contract, specifies a lot quality criterion expressed in terms of an NQL. In either case, it provides a coherent methodology for designating lots as satisfactory or unsatisfactory for shipment and proposed use.

Règles d'échantillonnage pour acceptation fondées sur le principe d'attribution de priorités (APP) — Partie 2: Plans d'échantillonnage simple coordonnés pour l'échantillonnage pour acceptation par attributs

L'ISO 28598-2 :2017 de l'ISO 28598 fournit des règles d'échantillonnage par attributs ainsi que des plans d'échantillonnage simple pour des contrôles indépendants successifs du même lot, effectués par le fournisseur, le client et/ou une tierce partie. L'ISO 28598-2 :2017 de l'ISO 28598 traite des aspects suivants: - le contrôle du fournisseur (contrôle final, certification du produit sur demande du fournisseur); - contrôle du client (contrôle de réception, surveillance, échantillonnage pour acceptation); - contrôle d'une tierce partie. L'ISO 28598-2 :2017 de l'ISO 28598 peut également être applicable lorsqu'un seul contrôle se révèle nécessaire. Une liste détaillée de plans d'échantillonnage simple est donnée, indexée par les limites de qualité normatives (LQN). L'ISO 28598-2 :2017 de l'ISO 28598 fournit des règles d'échantillonnage pour les éléments suivants: - le produit fini; - les composants et les unités discrètes; - les opérations; - les unités discrètes et les processus qui les produisent; - les données et les enregistrements. Les règles d'échantillonnage par attributs sont prévues pour le contrôle d'un lot isolé ou d'une série continue de lots d'un produit discret. Ces règles sont applicables lorsqu'un LQN est donné, exprimé en termes de pourcentage de non conformes ou de non-conformités pour 100 individus. L'ISO 28598-2 :2017 de l'ISO 28598 fournit un système coordonné de règles d'échantillonnage pour acceptation relatives au fournisseur, au client et à une tierce partie. Elle est applicable également dans les cas où un fournisseur, de façon individuelle, ou selon un accord avec le client, voire dans un contrat, spécifie un critère de qualité de lot exprimé en termes de LQN. Dans tous les cas, il est fourni une méthodologie cohérente permettant de désigner les lots comme satisfaisants ou non satisfaisants en vue de leur livraison et de leur utilisation proposée.

General Information

Status
Published
Publication Date
16-Oct-2017
ICS
03.120.30 - Application of statistical methods
Technical Committee
ISO/TC 69/SC 5 - Acceptance sampling
Drafting Committee
ISO/TC 69/SC 5 - Acceptance sampling
Current Stage
9093 - International Standard confirmed
Start Date
13-Jun-2024
Completion Date
19-Apr-2025
Ref Project

Relations

Consolidated By
ISO 80601-2-87:2021 - Medical electrical equipment — Part 2-87: Particular requirements for basic safety and essential performance of high-frequency ventilators
Effective Date
06-Jun-2022
Revises
ISO 13448-2:2004 - Acceptance sampling procedures based on the allocation of priorities principle (APP) — Part 2: Coordinated single sampling plans for acceptance sampling by attributes
Effective Date
04-Nov-2015
ISO 28598-2:2017 - Acceptance sampling procedures based on the allocation of priorities principle (APP)ISO 28598-2:2017 - Acceptance sampling procedures based on the allocation of priorities principle (APP)
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ISO 28598-2:2017 - Regles d'échantillonnage pour acceptation fondées sur le principe d'attribution de priorités (APP)ISO 28598-2:2017 - Regles d'échantillonnage pour acceptation fondées sur le principe d'attribution de priorités (APP)
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Standards Content (Sample)


INTERNATIONAL ISO
STANDARD 28598-2
First edition
2017-10
Acceptance sampling procedures
based on the allocation of priorities
principle (APP) —
Part 2:
Coordinated single sampling plans for
acceptance sampling by attributes
Règles d'échantillonnage pour acceptation fondées sur le principe
d'attribution de priorités (APP) —
Partie 2: Plans d'échantillonnage simple coordonnés pour
l'échantillonnage pour acceptation par attributs
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved

Contents Page
Foreword .v
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviations . 2
3.1 Terms and definitions . 2
3.2 Symbols and abbreviations . 3
4 Selection from among sampling systems by attributes . 4
4.1 Relationship between sampling systems . 4
4.2 Suitable environments for applying ISO 28598-2 . 4
4.3 Suitable environments for applying ISO 2859-1, ISO 2859-3 and ISO 28591 . 4
4.4 Suitable environments for applying ISO 2859-2. 4
5 Lot quality . 5
5.1 Lot quality measures . 5
5.2 Satisfactory and unsatisfactory lots . 5
5.3 Types of requirements . 5
5.4 Preferred NQLs . 5
5.5 Disposition of unsatisfactory lots . 5
6 Limits for other party's risk. 6
6.1 Supplier's sampling plans . . 6
6.1.1 Assignment of a customer's risk on supplier inspection . 6
6.1.2 Trust levels . 6
6.1.3 Supplementary trust levels . 6
6.2 Customer's sampling plans . 6
6.3 Permissible sampling plans . 8
6.4 Coordination of supplier's and customer's sampling plans . 8
6.5 Rule of the third party inspection . 8
7 Inspecting party's risk . 9
7.1 Supplier's sampling plans . . 9
7.2 Customer's sampling plans . 9
8 Basic data . 9
8.1 Supplier's sampling plans . . 9
8.2 Customer's sampling plans . 9
9 Catalogue of permissible sampling plans . 9
9.1 Composition of tables . 9
9.2 Tables for supplier permissible single sampling plans .10
9.2.1 Description of supplier single sampling tables .10
9.2.2 Tables for percent nonconforming .10
9.2.3 Tables for nonconformities per 100 items .11
9.2.4 Table entries .11
9.3 Tables for customer permissible single sampling plans .11
10 Choosing supplier's single sampling plans .11
10.1 Rules for choosing permissible single sampling plans .11
10.2 Recommendations on selecting a preferred plan from those permissible for T2
and T3 trust levels .12
10.2.1 Known estimate of a lot quality level .12
10.2.2 Known standard or estimate of a process quality level .12
11 Choosing customer's single sampling plans .12
11.1 General recommendations.12
11.2 Use of customer's sampling tables for known sample size .12
12 Sampling inspection for NQL = 0 .13
Annex A (normative) Tables for acceptance single sampling plans by attributes .14
Annex B (informative) Examples of application of catalogued permissible sampling plans .42
Annex C (informative) Theoretical justification .46
Bibliography .51
iv © ISO 2017 – All rights reserved

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 69, Applications of statistical methods,
Subcommittee SC 5, Acceptance sampling.
This first edition of ISO 28598-2 cancels and replaces ISO 13448-2:2004, of which it constitutes a minor
revision to change the reference number from 13448-2 to 28598-2.
With the view to achieve a more consistent portfolio, TC 69/SC 5 has simultaneously renumbered the
following standards, by means of minor revisions:
Old reference New reference Title
ISO 2859-10:2006 ISO 28590:2017 Sampling procedures for inspection by attributes — Intro-
duction to the ISO 2859 series of standards for sampling for
inspection by attributes
ISO 8422:2006 ISO 28591:2017 Sequential sampling plans for inspection by attributes
ISO 28801:2011 ISO 28592:2017 Double sampling plans by attributes with minimal sample
sizes, indexed by producer's risk quality (PRQ) and consum-
er's risk quality (CRQ)
ISO 18414:2006 ISO 28593:2017 Acceptance sampling procedures by attributes — Accept-ze-
ro sampling system based on credit principle for controlling
outgoing quality
ISO 21247:2005 ISO 28594:2017 Combined accept-zero sampling systems and process con-
trol procedures for product acceptance
ISO 14560:2004 ISO 28597:2017 Acceptance sampling procedures by attributes — Specified
quality levels in nonconforming items per million
ISO 13448-1:2005 ISO 28598-1:2017 Acceptance sampling procedures based on the allocation of
priorities principle (APP) — Part 1: Guidelines for the APP
approach
ISO 13448-2:2004 ISO 28598-2:2017 Acceptance sampling procedures based on the allocation
of priorities principle (APP) — Part 2: Coordinated single
sampling plans for acceptance sampling by attributes
Cross references between the above listed documents have
...


NORME ISO
INTERNATIONALE 28598-2
Première édition
2017-10
Règles d'échantillonnage pour
acceptation fondées sur le principe
d'attribution de priorités (APP) —
Partie 2:
Plans d'échantillonnage simple
coordonnés pour l'échantillonnage
pour acceptation par attributs
Acceptance sampling procedures based on the allocation of priorities
principle (APP) —
Part 2: Coordinated single sampling plans for acceptance sampling by
attributes
Numéro de référence
©
ISO 2017
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2017, Publié en Suisse
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni utilisée
sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie, l’affichage sur
l’internet ou sur un Intranet, sans autorisation écrite préalable. Les demandes d’autorisation peuvent être adressées à l’ISO à
l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – Tous droits réservés

Sommaire Page
Avant-propos .v
Introduction .vii
1 Domaine d'application . 1
2 Références normatives . 1
3 Termes, définitions, symboles et abréviations . 2
3.1 Termes et définitions . 2
3.2 Symboles et abréviations . 3
4 Choix parmi différents systèmes d'échantillonnage par attributs . 4
4.1 Relation entre les systèmes d'échantillonnage . 4
4.2 Environnements convenant à l'application de l'ISO 28598-2 . 4
4.3 Environnements convenant à l'application de l'ISO 2859-1, l'ISO 2859-3 et l'ISO 28591 . 5
4.4 Environnements convenant à l'application de l'ISO 2859-2 . 5
5 Qualité des lots . 5
5.1 Mesures de la qualité des lots . 5
5.2 Lots satisfaisants et lots non satisfaisants . 5
5.3 Types d'exigences . 5
5.4 Limites de qualité normatives préférentielles . 6
5.5 Disposition des lots non satisfaisants . 6
6 Limites applicables au risque de la partie adverse . 6
6.1 Plans d'échantillonnage du fournisseur . 6
6.1.1 Affectation d'un risque du client dans le cas d'un contrôle du fournisseur . 6
6.1.2 Niveaux de confiance. 7
6.1.3 Niveaux de confiance complémentaires . 7
6.2 Plans d'échantillonnage du client . 7
6.3 Plans d'échantillonnage acceptables . 9
6.4 Coordination des plans d'échantillonnage du fournisseur et du client .10
6.5 Règle du contrôle effectué par une tierce partie .10
7 Risque de la partie en charge d'un contrôle .10
7.1 Plans d'échantillonnage du fournisseur .10
7.2 Plans d'échantillonnage du client .10
8 Données de base .10
8.1 Plans d'échantillonnage du fournisseur .10
8.2 Plans d'échantillonnage du client .11
9 Liste détaillée des plans d'échantillonnage acceptables .11
9.1 Composition des tableaux .11
9.2 Tableaux applicables aux plans d'échantillonnage simple acceptables du fournisseur .11
9.2.1 Description des tableaux d'échantillonnage simple du fournisseur .11
9.2.2 Tableaux relatifs au pourcentage de non conformes .12
9.2.3 Tableaux relatives aux non-conformités pour 100 individus .12
9.2.4 Entrées des tableaux .12
9.3 Tableaux relatives aux plans d'échantillonnage simple acceptables du client .12
10 Choix des plans d'échantillonnage simple du fournisseur .13
10.1 Règles de choix des plans d'échantillonnage simple acceptables .13
10.2 Recommandations relatives à la sélection d'un plan préférentiel parmi les plans
acceptables pour les niveaux de confiance T2 et T3 .13
10.2.1 Estimation connue du niveau de qualité d'un lot .13
10.2.2 Étalon ou estimation connu(e) du niveau de qualité d'un processus .13
11 Choix des plans d'échantillonnage simple du client .14
11.1 Recommandations générales.14
11.2 Utilisation des tableaux d'échantillonnage du client pour un effectif
d'échantillon connu .14
12 Contrôle par échantillonnage pour LQN = 0 .14
Annexe A (normative) Tableaux relatifs aux plans d'échantillonnage simple pour
acceptation par attributs .15
Annexe B (informative) Exemples d'application de plans d'échantillonnage
acceptables détaillés .42
Annexe C (informative) Justification théorique .46
Bibliographie .51
iv © ISO 2017 – Tous droits réservés

Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes
nationaux de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est
en général confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude
a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,
gouvernementales et non gouvernementales, en liaison avec l'ISO participent également aux travaux.
L'ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui
concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier de prendre note des différents
critères d'approbation requis pour les différents types de documents ISO. Le présent document a été
rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir www.
iso.org/directives).
L'attention est appelée sur le fait que certains des éléments du présent document peuvent faire l'objet de
droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable
de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant
les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de
l'élaboration du document sont indiqués dans l'Introduction et/ou dans la liste des déclarations de
brevets reçues par l'ISO (voir www.iso.org/brevets).
Les appellations commerciales éventuellement mentionnées dans le présent document sont données
pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un
engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion
de l'ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles
techniques au commerce (OTC), voir le lien suivant: www.iso.org/iso/fr/avant-propos.html
Le présent document a été élaboré par le comité technique ISO/TC 69, Application des méthodes
statistiques, sous-comité SC 5, Échantillonnage en vue d'acceptation.
Cette première édition de l’ISO 28598-2 annule et remplace l’ISO 13448-2:2004 qui a fait l’objet d’une
révision mineure pour changer l’ancien numéro de référence, 13448-2, par le nouveau, 28598-2.
En vue d’obtenir un portfolio plus cohérent, le TC 69/SC 5 a renuméroté simultanément les normes
suivantes, par le biais de révisions mineures:
Ancienne référence Nouvelle référence Titre
ISO 2859-10:2006 ISO 28590:2017 Règles d'échantillonnage pour les contrôles par attributs —
Introduction au système d'échantillonnage pour les contrôles par
attributs de l'ISO 2859
ISO 8422:2006 ISO 28591:2017 Plans d'échantillonnage progressif pour le contrôle par attributs
ISO 28801:2011 ISO 28592:2017 Plans d'échantillonnage double par attributs, avec taille d'échan-
tillon minimale, indexés par la qualité du risque du fournisseur
(QRF) et la qualité du risque du client (QRC)
ISO 18414:2006 ISO 28593:2017 Procédures d'échantillonnage par attributs pour acceptation —
Système d'échantillonnage de tolérance z4ro-défaut basé sur le
principe de crédit pour le contrôle de la qualité à la sortie
ISO 21247:2005 ISO 28594:2017 Systèmes d'échantillonnage de tolérance zéro-défaut et procé-
dures de maîtrise des processus combinés pour l'acceptation de
produits
Ancienne référence Nouvelle référence Titre
ISO 14560:2004 ISO 28597:2017 Règles d'échantillonnage par attributs en vue d'acceptation —
Niveaux spécifiés de qualité en termes d'individus non conformes
pour un million d'individus
ISO 13448-1:2005 ISO 28598-1:2017 Règles d'échantillonnage pour acceptation fondée
...

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Sampling procedures for inspection by attributes — Part 2: Sampling plans indexed by limiting quality (LQ) for isolated lot inspection
SIST ISO 2859-2:2020

This document specifies an acceptance sampling system for inspection by attributes indexed by limiting quality (LQ). The sampling system is used for lots in isolation (isolated sequences of lots, an isolated lot, a unique lot or a short series of lots), where switching rules, such as those of ISO 2859‑1, are not applicable. Inspection levels, as provided by ISO 2859‑1 to control the relative amount of inspection, are not provided in this document. In many industrial situations, in which switching rules might be used, they are not applied for a number of reasons, not all of which might be valid: a) production is intermittent (not continuous); b) production is from several different sources in varying quantities, i.e. "job lots"; c) lots are isolated; d) lots are resubmitted after inspection. The sampling plans in this document are indexed by a series of specified values of limiting quality (LQ), where the consumer's risk (the probability of acceptance at the LQ) is usually below 0,10 (10 %), except in some instances. This document is intended both for inspection for nonconforming items and for inspection for nonconformities per 100 items. It is intended to be used when the supplier and the consumer both regard the lot to be in isolation. That is, the lot is unique in that it is the only one of its type produced. It can also be used when there is a series of lots too short for switching rules to be applied.

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ISO
ISO 39511:2018(Main)
Sequential sampling plans for inspection by variables for percent nonconforming (known standard deviation)
SIST ISO 39511:2018

This International Standard specifies sequential sampling plans and procedures for inspection by variables of discrete items. The plans are indexed in terms of producer's risk point and the consumer's risk point. Therefore, they are suitable not only for the purposes of acceptance sampling, but for the more general purpose of the testing of simple statistical hypotheses for proportions. The purpose of this International Standard is to provide procedures for the sequential assessment of inspection results that may be used to induce the supplier to supply lots of a quality having a high probability of acceptance. At the same time, the consumer is protected by a prescribed upper limit to the probability of accepting a lot (or process) of poor quality. This International Standard is primarily designed for use under the following conditions: a) 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. In such a case, sampling of particular lots is equivalent to the sampling of the process. If there are different producers or production processes, this International Standard shall be applied to each one separately; b) where only a single quality characteristic x of these products is taken into consideration, which must be measurable on a continuous scale; c) where the measurement error is negligible (i.e. with a standard deviation no more than 10 % of the process standard deviation); d) where production is stable (under statistical control) and the quality characteristic x has a known standard deviation, and is distributed according to a normal distribution or a close approximation to the normal distribution; CAUTION — The procedures in this International Standard are not suitable for application to lots that have been screened previously for nonconforming items. e) 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 ≤ U (i.e. the upper specification limit is not violated); x ≥ L (i.e. the lower specification limit is not violated); and (i.e. neither the upper nor the lower specification limit is violated.) Inequalities 1) and 2) are called cases with a "single specification limit", and 3) is the case with "double specification limits". In this International Standard, it is assumed that, where double specification limits apply, conformance to both specification limits is either equally important to the integrity of the product or is considered separately for both specification limits. In the first case, it is appropriate to control the combined percentage of product outside the two specification limits. This is referred to as combined control. In the second case, nonconformity beyond each of the limits is controlled separately, and this is referred to as separate control.

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ISO
ISO 28594:2017(Main)
Combined accept-zero sampling systems and process control procedures for product acceptance

ISO 28594:2017 provides a set of accept‑zero sampling systems and procedures for planning and conducting inspections to assess quality and conformance to specified requirements. In addition, this International Standard provides requirements for alternative acceptance methods proposed by the supplier. Such alternative methods would be based upon establishing and implementing an internal prevention‑based quality management system as a means of ensuring that all products conform to requirements specified by the contract and associated specifications and standards. ISO 28594:2017, when cited in contract, is applicable to the supplier and extends to subcontractors or vendors. The quality plans are to be applied as specified in the contract documents, and deliverables may be submitted for acceptance if the requirements of this International Standard have been met. Sampling systems and procedures in this International Standard are applicable, when appropriate, to assess conformance to requirements of the following: a) end items; b) components or basic materials; c) operations or services; d) materials in process; e) supplies in storage; f) maintenance operations; g) data or records; h) administrative procedures. NOTE Use of the word "product" throughout this International Standard also refers to services and other deliverables. The sampling systems and procedures of this International Standard are not intended for use with destructive tests or where product screening is not feasible or desirable. In such cases, the sampling systems to be used will be specified in the contract or product specifications.

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ISO
ISO 28593:2017(Main)
Acceptance sampling procedures by attributes — Accept-zero sampling system based on credit principle for controlling outgoing quality

ISO 28593:2017 specifies a system of single sampling schemes for lot-by-lot inspection by attributes. All the sampling plans of the present system are of accept-zero form, i.e. no lot is accepted if the sample from it contains one or more nonconforming items. The schemes depend on a suitably-defined average outgoing quality limit (AOQL), the value of which is chosen by the user; no restrictions are placed on the choice of the value of the AOQL or on the sizes of successive lots in the series. The methodology ensures that the overall average quality reaching the customer or market-place will not exceed the AOQL in the long run.

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ISO
ISO 28598-1:2017(Main)
Acceptance sampling procedures based on the allocation of priorities principle (APP) — Part 1: Guidelines for the APP approach

ISO 28598-1:2017 provides guidelines specifying the organizational principles of acceptance sampling in situations where the contract or the legislation provides for successive inspection to be carried out by different parties: the supplier, the customer and/or a third party. These guidelines are designed for inspection of populations of any product supplied or delivered in discrete items in lots. They are applicable to - supplier inspection (final inspection, product certification upon supplier's request), - customer inspection (incoming inspection, audit inspection, acceptance sampling), - third-party inspection (certification of product, inspection and supervision for observance of International Standard requirements, quality inspection carried out at the supplier, and/or customer, request), where the quality levels and the lot acceptability criteria are specified unilaterally by the supplier or contractually by the supplier and the customer. These guidelines are also applicable to situations when only one sampling inspection is actually needed. NOTE Single sampling APP plans by attributes are given in ISO 28598‑2. The guidelines provided by this part of ISO 28598 may be applied in developing standards on acceptance sampling for standard inspection models, specific items or quality levels, as well as in developing contracts, specifications and instructions. In contractual use of the APP, the parties concerned should acknowledge in the contract that they approve of its principles (also by referring to the present guidelines). The parties may also provide for the use of the APP in disputes and arbitration.

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ISO
ISO 28590:2017(Main)
Sampling procedures for inspection by attributes — Introduction to the ISO 2859 series of standards for sampling for inspection by attributes
SIST ISO 28590:2018

ISO 28590:2017 provides a general introduction to acceptance sampling by attributes and provides a brief summary of the attribute sampling schemes and plans used in ISO 2859‑1, ISO 2859‑2, ISO 2859‑3, ISO 2859‑4 and ISO 2859‑5, which describe specific types of attribute sampling systems. It also provides guidance on the selection of the appropriate inspection system for use in a particular situation.

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