Ansi

ANSI/ASQ Z1.4-2003

AMERICAN NATIONAL STANDARD
SAMPLING PROCEDURES AND TABLES FOR INSPECTION BY ATTRIBUTES

AMERICAN SOCIETY FOR QUALITY 600 NORTH PLANKINTON AVENUE MILWAUKEE, WISCONSIN 53203

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ANSI/ASQ Z1.4-2003

AMERICAN NATIONAL STANDARDSampling Procedures and Tables for Inspection by Attributes

Prepared by The Statistics Subcommittee of the Accredited Standards Committee Z1 on Quality, Environment, Dependability and Statistics Secretariat American Society for Quality

Licensed to Sergio Rios Junquera. ANSI order X_69895. Downloaded 7/2/2008 7:04 PM. Single user license only. Copying and networking prohibited.

AbstractSampling Procedures and Tables for Inspection by Attributes is an acceptance sampling system to be used with switching rules on a continuing stream of lots for AQL specified. It provides tightened, normal, and reduced plans to be applied for attributes inspection for percent nonconforming or nonconformities per 100 units. AMERICAN NATIONAL STANDARD: An American national Standard implies a consensusof those substantially concerned with its scope and provisions. An American National Standard is intended as a guide to aid the manufacturer, the consumer, and the general public. The existence of an American National Standard does not in any respect preclude anyone, whether he has approved the standard or not, from manufacturing, marketing, purchasing, or using products, processes, or proceduresnot conforming to the standard. American National Standards are subject to periodic review and users are cautioned to obtain the latest editions. CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action be taken to reaffirm, revise, or withdraw this standard no later than five years fromthe date of publication. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute.

Published by AMERICAN SOCIETY FOR QUALITY 600 NORTH PLANKINTON MILWAUKEE, WISCONSIN 53203 © 2003 by the AMERICAN SOCIETY FOR QUALITY No part of this publication may be reproduced in any form, in an electronicretrieval system or otherwise, without the prior written permission of the publisher. Printed in the United States of America

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Foreword
(This foreword is not a part of the American National Standard—Sampling Procedures and Tables for Inspection byAttributes, Z1.4-2003) This standard is a revision of ANSI/ASQC Z1.4-1993, “Sampling Procedures and Tables for Inspection by Attributes.” Beyond editorial refinements, only the following eight changes have been made: 1) Acceptable Quality Level (AQL) has been changed to Acceptance Quality Limit (AQL). See Clause 4. 2) The definition and explanation of AQL have been changed. See Clauses 4.2 and 4.3. 3) TheDiscontinuation of Inspection rule has been changed. See Clause 8.4. 4) ANSI/ASQC A2-1987 has been changed to ANSI/ASQ A3534-2-1993. See Clauses 2 and 7.2. 5) ANSI/ASQC Q3 has been changed to ASQC Q3-1988. See Clause 11.6.3. 6) The connected arrows in Table II-A, III-A, III-C, IV-A, and IV-C have been separated. 7) In Tables III-A, III-B, and III-C and for clarification of instructions, the *footnote has changed and the + footnote added. 8) In Tables IV-A, IV-B, and IV-C and for clarification of instructions, the footnotes * and ++ have changed and the footnote ## added. Note 1: Other than 3), 7), and 8) above, all tables, table numbers and procedures used in MIL-STD-105E (which was cancelled in 1995) have been retained. Note 2: A compatible and interchangeable standard for variables...