INTERNATIONAL ISO/IEC STANDARD 25019 First edition 2023-11 Systems and software engineering : Systems and software Quality Reguirements and Evaluation (SQuaRE) Quality-in-use model Ingénierie des systemes et du logiciel - Exigences de qualite et évaluation des systemes et du logiciel (SQuaRE) - Modele de qualité defonctionnement Reference number IEC IS0/IEC 25019:2023(E) ISO @IS0/IEC2023 IS0/IEC 25019:2023(E) COPYRIGHT PROTECTED DOCUMENT IS0/IEC2023 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 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 CP 401 · Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Email: [email protected] Website: www.iso.org Published in Switzerland ii @IS0/IEC 2023-All rights reserved