ISO INTERNATIONAL STANDARD 18921 Second edition 2008-10-15 Imaging materials Compact discs (CD-ROM) Method for estimating the life expectancy based on the effects of temperature and relative humidity Materiaux pour I'image — Disques compacts (CD-ROM) — Methode d'estimation de I'espérance de vie basee sur les effets de la température et de I'humidite relative Reference number ISO 18921:2008(E) @ ISO 2008 by IHS under ted without license from IHS Not for Resale ISO 18921:2008(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 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 COPYRIGHTPROTECTEDDOCUMENT @ ISO2008 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 @ ISO 2008 - All rights reserved edwithoutlicense from IHS Not for Resale ISO 18921:2008(E) Contents Page Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Purpose and assumptions. 4.1 Purpose 4.2 Assumptions 5 Measurements 5.1 Block error rate (BLER) 5.2 Test equipment .... 5.3 Test specimen.... 6 Accelerated stress test plan.. 6.1 General .... 6.2 Stress conditions 6.3 Accelerated test cell specimen population.... 6.4 Time intervals .... 6.5 Test plan...... 6.6 Measurement condition 7 Data evaluation ... 7.1 Eyring acceleration model.. 8 7.2 Failure distribution model .9 7.3 Accelerationfactors. 7.4 Survivor analysis... 10 8 Disclaimer .10 AnnexA(informative)Stepanalysisoutline.. 11 Annex B (informative) Example of test plan and data analysis.. 12 Bibliography. Copyright International Organization for Standardizalon ghts reserved ii nse from IHS Not for Resale