ISO/IEC/ INTERNATIONAL STANDARD IEEE 29148 Second edition 2018-11 Systems and software engineering Life cycle processes Requirements engineering Ingenierie des systemes et du logiciel - Processus du cycle de vie - Ingénierie des exigences IEC Reference number IS0/IEC/IEEE29148:2018(E) 3331@ @ IS0/IEC 2018 @IEEE2018 IS0/IEC/IEEE 29148:2018(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0/IEC 2018 IEEE2018 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 respectiveaddressbeloworIso'smemberbodyinthecountryoftherequester. 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 Fax: +41 22 749 09 47 Email: [email protected] Email: [email protected] Website: www.iso.org Website: www.ieee.org Published in Switzerland @ IS0/IEC 2018 - All rights reserved ii @ IEEE 2018 - All rights reserved IS0/IEC/IEEE 29148:2018(E) Contents Page Foreword .vi Introduction .vii 1 Scope 2 Normative references 3 Terms, definitions and abbreviated terms 3.1 Terms and definitions. 1 3.2 Abbreviated terms... 7 4 Conformance. ..8 4.1 Intended usage. 8 4.2 Full conformance. 4.3 Conformance to processes 8 4.4 Conformancetoinformationitemcontent .8 4.5 Tailored conformance. 9 4.5.1 Processes 9 4.5.2 Information items 9 5 Concepts .9 5.1 General .9 5.2 Requirements fundamentals .9 5.2.1 General. .9 5.2.2 Stakeholders.. 5.2.3 Transformation of needs into requirements 10 5.2.4 Requirements construct. 10 5.2.5 Characteristics of individual requirements 12 5.2.6 Characteristics of a set of requirements. 13 5.2.7 Requirement language criteria. 14 5.2.8 Requirements attributes 14 5.3 Practical considerations. 16 5.3.1 Application of iteration and recursion 16 5.3.2 Iteration and recursion in requirements engineering 17 5.4 Requirement information items 18 6 Processes 20 6.1 Requirement processes 20 6.1.1 Guidelines for processes. 20 6.2 Business or mission analysis process. 21 6.2.1 Purpose 21 6.2.2 Outcomes 22 6.2.3 Activitiesand tasks 22 6.3 Stakeholder needs and requirements definition process 26 6.3.1 Purpose. 26 6.3.2 Outcomes 26 6.3.3 Activities and tasks 26 6.4 System [System/Software] Requirements definition process 34 6.4.1 Purpose. 34 6.4.2 Outcomes 35 6.4.3 Activities and tasks .35 6.5 Requirements engineering activities in other technical processes 41 6.5.1 Reguirementsactivitiesinarchitecturedefinition. 41 6.5.2 Requirementsactivities inverification. 42 6.5.3 Requirements activities in validation. 44 6.6 Requirements management. 45 6.6.1 Management overview. .45 6.6.2 Change management.. .46 IS0/IEC2018-Allrightsreserved @ IEEE 2018 - All rights reserved iii IS0/IEC/IEEE 29148:2018(E) 6.6.3 Measurement for requirements 48 7 Information items .50 8 Guidelines for information items. 51 8.1 Requirements information item outlines. .51 8.2 Business requirements specification. .51 8.2.1 General. 51 8.2.2 BRS example outline 51 8.3 Stakeholder requirements specification 52 8.3.1 General 52 8.3.2 StRS example outline. 53 8.4 System requirements specification 54 8.4.1 General. 54 8.4.2 SyRS example outline 54 8.5 Software requirements specification .55 8.5.1 General. 55 8.5.2 SRS example outline .56 9 Information item content .57 9.1 General .57 9.2 General content 57 9.2.1 Identification .57 9.2.2 Front matter. 57 9.2.3 Definitions. 58 9.2.4 References 58 9.2.5 Acronyms and abbreviations. 58 9.3 Business requirements specification (BRS) content 58 9.3.1 BRS overview.. 58 9.3.2 Business purpose 58 9.3.3 Business scope 58 9.3.4 Businessoverview 59 9.3.5 MajorStakeholders. 59 9.3.6 Business environment .59 9.3.7 Mission, goals and objectives 59 9.3.8 Business model. 59 9.3.9 Information environment 59 9.3.10 Business processes 59 9.3