ISO/IEC/ INTERNATIONAL STANDARD IEEE 15026-4 First edition 2021-05 Systems and software engineering Systems and software assurance Part 4: Assurance in the life cycle Ingénierie du logiciel et des systemes - Assurance du logiciel et des systemes - Partie 4: Assurance du cycle de vie IEC Reference number IS0/IEC/IEEE15026-4:2021(E) IEEE @ IS0/IEC 2021 @IEEE2021 IS0/IEC/IEEE15026-4:2021(E) COPYRIGHT PROTECTED DOCUMENT @ IS0/IEC2021 @IEEE2021 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 respective address below or ISO's member body in the country of the requester. ISO copyright office Institute of Electrical and Electronics Engineers, Inc CP 401 : Ch. de Blandonnet 8 3 Park Avenue, New York CH-1214 Vernier, Geneva NY10016-5997,USA Phone: +41 22 749 01 11 Email: [email protected] Email: [email protected] Website: www.iso.org Website: www.ieee.org Published in Switzerland @ IS0/IEC 2021 - All rights reserved ii IEEE2021-Allrightsreserved