ISO/TR TECHNICAL REPORT 8550-1 First edition 2007-06-01 Guidance on the selection and usage of acceptance sampling systems for inspection of discrete items in lots Part 1: Acceptance sampling Lignes directrices pour la sélection d'un systeme, d'un programme ou d'un plan d'echantllonnage pour acceptation pour le controle d'unites discretes en lots- Partie 1: Lignes directrices genérales pour I'échantillonnage pour acceptation Reference number ISO/TR 8550-1:2007(E) @ ISO 2007 y IHS under ted without license from IHS Not for Resale ISO/TR 8550-1:2007(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The IsO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT @ISO2007 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's member body in the country of the requester. ISO copyright office Case postale 56 . CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ IS0 2007 - All rights reserved Tby IHS unde I without license from IHS Not for Resale ISO/TR 8550-1:2007(E) Contents Page Foreword Introduction 1 Scope 2 Normative references . 3 Terms and definitions. 4 Abuses and uses of acceptance sampling ... 5 Acceptance sampling plans, schemes and systems . 6 Practical and economic advantages of using standard sampling plans.. 5 7 Attributes versus variables.. 8 Further considerations influencing a selection... 8 9 Making a comparison of the methods for sampling inspection 23 10 Other methods sometimes adopted in practice .. 11 Relevance of market and production conditions . 12 The final selection - Realism ..... Annex A (informative) Example of a simple model for profit maximization under destructive inspection by attributes .. .33 Bibliography 37 CopyrightInternatinal Oorganizain for standardizalion ghts reserved ii se from IHS Not for Resale ISO/TR 8550-1:2007(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (lsO memberbodies).The work of preparingInternational Standards is normallycarriedout throughIsO technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeer 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. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. In exceptional circumstances, when a technical committee has collected data of a different kind from that informative in nature and does not have to be reviewed until the data it provides are considered to be no longer valid or useful. Attention is drawn to the possibility that some of the elements of this docume