Systems and software engineering - Software product Quality Requirements and Evaluation (SQuaRE) - Common Industry Format (CIF) for Usability: User requirements specification (ISO 25065:2019)

This document provides a framework and consistent terminology for specifying user requirements. It specifies the common industry format (CIF) for a user requirement specification including the content elements and the format for stating those requirements.
NOTE 1 A user requirements specification is the formal documentation of a set of user requirements, which aids in the development and evaluation of usable interactive systems.
In this document, user requirements refers to:
a) user-system interaction requirements for achieving intended outcomes (including requirements for system outputs and their attributes);
b) use-related quality requirements that specify the quality criteria associated with the outcomes of users interacting with the interactive system and can be used as criteria for system acceptance.
NOTE 2 ISO/IEC 25030 introduces the concept of quality requirements. The use-related quality requirements in this document are a particular type of quality requirement.
The content elements of a user requirements specification are intended to be used as part of documentation resulting from the activities specified in ISO 9241-210, and from human centred design processes, such as those in ISO 9241-220.
This document is intended to be used by requirements engineers, business analysts, product managers, product owners, and people acquiring systems from third parties.
The CIF series of standards addresses usability-related information (as described in ISO 9241-11 and ISO/IEC TR 25060).
NOTE 3 In addition to usability, user requirements can include other perspectives, such as human-centred quality introduced in ISO 9241-220, and other quality perspectives presented in ISO/IEC 25010, ISO/IEC TS 25011, and ISO/IEC 25030.
NOTE 4 While this document was developed for interactive systems, the guidance can also be applied in other domains.
This document does not prescribe any kind of method, lifecycle or process. The content elements of a user requirements specification can be used in iterative development which includes the elaboration and evolution of requirements (e.g. as in agile development).

System- und Software-Engineering - Qualitätskriterien und Bewertung von Systemen und Softwareprodukten (SQuaRE) - Allgemeines Industrieformat (CIF) zur Gebrauchstauglichkeit: Spezifikation der Nutzungsanforderungen (ISO 25065:2019)

Dieses Dokument bietet einen Rahmen und eine konsistente Terminologie für die Spezifizierung von Nutzungsanforderungen. Es spezifiziert das allgemeine Industrieformat (CIF, en: Common Industry Format) für die Spezifikation von Nutzungsanforderungen inklusive der Inhaltselemente und des Formats für die Angabe dieser Anforderungen.
ANMERKUNG 1 Eine Spezifikation der Nutzungsanforderungen ist die formale Dokumentation eines Satzes an Nutzungsanforderungen, die die Entwicklung und Evaluierung gebrauchstauglicher interaktiver Systeme unterstützen.
In diesem Dokument beziehen sich Nutzungsanforderungen auf:
a) Anforderungen an Benutzer-System-Interaktionen zum Erreichen beabsichtigter Ergebnisse (einschließlich Anforderungen an Systemausgaben und deren Attribute);
b) nutzungsbezogene Qualitätsanforderungen, die die Qualitätskriterien in Verbindung mit den Ergebnissen der Interaktion von Benutzern mit dem interaktiven System festlegen und als Kriterium für die Systemabnahme verwendet werden können.
ANMERKUNG 2 ISO/IEC 25030 führt das Konzept von Qualitätsanforderungen ein. Die nutzungsbezogenen Qualitäts¬anforderungen in diesem Dokument sind ein bestimmter Typ von Qualitätsanforderungen.
Die Inhaltselemente einer Spezifikation der Nutzungsanforderungen sind zur Verwendung als Teil einer Dokumentation vorgesehen, die das Ergebnis der in ISO 9241 210 festgelegten Aktivitäten und der mensch¬zentrierten Gestaltungsprozesse wie die in ISO 9241 220 beschriebenen sind.
Dieses Dokument ist vorgesehen für die Verwendung durch Anforderungsingenieure, Wirtschaftsexperten, Produktmanager, Produktverantwortliche und Menschen, die Systeme von Dritten erwerben.
Die CIF Normenreihe behandelt Informationen bezüglich der Gebrauchstauglichkeit (wie in ISO 9241 11 und ISO/IEC TR 25060 beschrieben).
ANMERKUNG 3 Zusätzlich zur Gebrauchstauglichkeit können Nutzungsanforderungen auch andere Aspekte wie z. B. die in ISO 9241 220 eingeführte menschzentrierte Qualität und andere, in ISO/IEC 25010, ISO/IEC TS 25011 und ISO/IEC 25030 vorgestellte Qualitätsaspekte enthalten.
ANMERKUNG 4 Obwohl dieses Dokument für interaktive Systeme entwickelt wurde, können die enthaltenen Leitlinien auch in anderen Bereichen angewendet werden.
Dieses Dokument schreibt keine Methoden, Lebenszyklen oder Prozesse vor. Die Inhaltselemente einer Spezifikation der Nutzungsanforderungen können in der iterativen Entwicklung verwendet werden, was auch die Ausarbeitung und Änderung von Anforderungen (z. B. in der agilen Entwicklung) mit einschließt.

Ingénierie des systèmes et du logiciel - Exigences et évaluation de la qualité des systèmes et logiciels (SQuaRE) - Format industriel commun pour la facilité d'utilisation: Spécification des exigences de l’utilisateur (ISO 25065:2019)

Le présent document fournit un cadre et une terminologie cohérente pour spécifier les exigences utilisateur. Il spécifie le format industriel commun (CIF) applicable à une spécification d'exigences utilisateur, y compris les éléments de contenu et le format d'énonciation des exigences.
NOTE 1 Une spécification d'exigences utilisateur est la documentation formelle d'un ensemble d'exigences utilisateur, qui facilite le développement et l'évaluation de systèmes interactifs utilisables.
Dans le présent document, les exigences utilisateur font référence:
a) aux exigences en matière d'interaction utilisateur-système pour atteindre les résultats escomptés (y compris les exigences pour les données de sortie système et leurs attributs);
b) aux exigences de qualité liées à l'utilisation qui spécifient les critères de qualité associés aux résultats des utilisateurs interagissant avec le système interactif et peuvent être utilisées comme critères d'acceptation du système.
NOTE 2 L'ISO/IEC 25030 introduit le concept d'exigences de qualité. Les exigences de qualité liées à l'utilisation figurant dans le présent document sont un type particulier d'exigences de qualité.
Les éléments de contenu d'une spécification d'exigences utilisateur sont destinés à être utilisés dans le cadre de la documentation résultant des activités spécifiées dans l'ISO 9241-210 et des processus de conception centrée sur l'opérateur humain, tels que ceux de l'ISO 9241-220.
Le présent document est destiné à être utilisé par les spécialistes des spécifications d'exigences, les analystes commerciaux, les chefs de produit, les responsables produits et les personnes qui acquièrent des systèmes auprès de tiers.
La série de normes CIF traite des informations liées à l'utilisabilité (comme décrit dans l'ISO 9241-11 et l'ISO/IEC TR 25060).
NOTE 3 Outre l'utilisabilité, les exigences utilisateur peuvent inclure d'autres perspectives, comme la qualité centrée sur l'opérateur humain introduite dans l'ISO 9241-220 et d'autres perspectives de qualité présentées dans l'ISO/IEC 25010, l'ISO/IEC TS 25011 et l'ISO/IEC 25030.
NOTE 4 Bien que le présent document ait été développé pour des systèmes interactifs, les recommandations peuvent également être appliquées dans d'autres domaines.
Le présent document n'impose aucun type de méthode, cycle de vie ou processus. Les éléments de contenu d'une spécification d'exigences utilisateur peuvent être utilisés pour le développement itératif, qui comprend l'élaboration et l'évolution des exigences (par exemple, comme pour le développement agile).

Sistemi in programska oprema - Zahteve za kakovost in vrednotenje programske opreme (SQuaRE) - Skupni industrijski format (CIF) za uporabnost: specifikacija zahtev uporabnikov (ISO 25065:2019)

General Information

Status
Published
Publication Date
14-Jan-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Oct-2020
Due Date
06-Dec-2020
Completion Date
15-Jan-2021

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SLOVENSKI STANDARD
SIST EN ISO 25065:2021
01-februar-2021
Sistemi in programska oprema - Zahteve za kakovost in vrednotenje programske
opreme (SQuaRE) - Skupni industrijski format (CIF) za uporabnost: specifikacija
zahtev uporabnikov (ISO 25065:2019)
Systems and software engineering - Software product Quality Requirements and

Evaluation (SQuaRE) - Common Industry Format (CIF) for Usability: User requirements

specification (ISO 25065:2019)
System- und Software-Engineering - Qualitätskriterien und Bewertung von Systemen
und Softwareprodukten (SQuaRE) - Allgemeines Industrieformat (CIF) zur
Gebrauchstauglichkeit: Spezifikation der Nutzungsanforderungen (ISO 25065:2019)

Ingénierie des systèmes et du logiciel - Exigences et évaluation de la qualité des

systèmes et logiciels (SQuaRE) - Format industriel commun pour la facilité d'utilisation:

Spécification des exigences de l’utilisateur (ISO 25065:2019)
Ta slovenski standard je istoveten z: EN ISO 25065:2020
ICS:
13.180 Ergonomija Ergonomics
35.080 Programska oprema Software
SIST EN ISO 25065:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 25065:2021
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SIST EN ISO 25065:2021
EN ISO 25065
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2020
EUROPÄISCHE NORM
ICS 13.180; 35.080
English Version
Systems and software engineering - Software product
Quality Requirements and Evaluation (SQuaRE) - Common
Industry Format (CIF) for Usability: User requirements
specification (ISO 25065:2019)

Ingénierie des systèmes et du logiciel - Exigences et System- und Software-Engineering - Qualitätskriterien

évaluation de la qualité des systèmes et logiciels und Bewertung von Systemen und Softwareprodukten

(SQuaRE) - Format industriel commun pour la facilité (SQuaRE) - Allgemeines Industrieformat (CIF) zur

d'utilisation: Spécification des exigences de l'utilisateur Gebrauchstauglichkeit: Spezifikation der

(ISO 25065:2019) Nutzungsanforderungen (ISO 25065:2019)
This European Standard was approved by CEN on 31 August 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 25065:2020 E

worldwide for CEN national Members.
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SIST EN ISO 25065:2021
EN ISO 25065:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 25065:2021
EN ISO 25065:2020 (E)
European foreword

The text of ISO 25065:2019 has been prepared by Technical Committee ISO/TC 159 "Ergonomics” of

the International Organization for Standardization (ISO) and has been taken over as EN ISO 25065:2020

by Technical Committee CEN/TC 122 “Ergonomics” the secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by March 2021, and conflicting national standards shall

be withdrawn at the latest by March 2021.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 25065:2019 has been approved by CEN as EN ISO 25065:2020 without any modification.

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SIST EN ISO 25065:2021
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SIST EN ISO 25065:2021
INTERNATIONAL ISO
STANDARD 25065
First edition
2019-05
Systems and software engineering —
Software product Quality
Requirements and Evaluation
(SQuaRE) — Common Industry Format
(CIF) for Usability: User requirements
specification
Ingénierie des systèmes et du logiciel — Exigences et évaluation de
la qualité des systèmes et logiciels (SQuaRE) — Format industriel
commun pour la facilité d'utilisation: Spécification des exigences de
l'utilisateur
Reference number
ISO 25065:2019(E)
ISO 2019
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SIST EN ISO 25065:2021
ISO 25065:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

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: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
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SIST EN ISO 25065:2021
ISO 25065:2019(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

3.1 Terms related to user requirements ..................................................................................................................................... 2

3.2 Terms related to interactive systems ................................................................................................................................... 4

3.3 Terms related to the concept of usability ......................................................................................................................... 5

4 Conformance ............................................................................................................................................................................................................. 6

5 User requirements specification ......................................................................................................................................................... 6

5.1 General ........................................................................................................................................................................................................... 6

5.2 Relationship between user requirements specification and stakeholder

requirements specification ........................................................................................................................................................... 7

5.3 Types of user requirements ......................................................................................................................................................... 7

5.3.1 General...................................................................................................................................................................................... 7

5.3.2 User-system interaction requirements ........................................................................................................ 7

5.3.3 Use-related quality requirements ..................................................................................................................... 7

6 Content elements of a user requirements specification ............................................................................................. 8

6.1 Overview on the content elements ........................................................................................................................................ 8

6.2 Interactive system for which a set of user requirements are specified.................................................. 8

6.2.1 Identification of interactive system ................................................................................................................. 8

6.2.2 Predecessors or previous versions of the interactive system (if applicable) .............. 8

6.3 Constraints on design ........................................................................................................................................................................ 8

6.4 Context of use for which the user requirements apply ........................................................................................ 9

6.5 Goals and tasks to be supported .............................................................................................................................................. 9

6.6 User requirements ............................................................................................................................................................................10

6.6.1 Stating user requirements ....................................................................................................................................10

6.6.2 Information to be provided with each user requirement ..........................................................12

6.6.3 Structure for presenting the user requirements ...............................................................................14

6.7 User interface design guidance to be applied............................................................................................................15

Annex A (informative) Example of content elements from a user requirements specification ...........16

Bibliography .............................................................................................................................................................................................................................20

© ISO 2019 – All rights reserved iii
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SIST EN ISO 25065:2021
ISO 25065:2019(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso

.org/iso/foreword .html.

This document was prepared jointly by Technical Committee ISO/TC 159, Ergonomics, Subcommittee

SC 4, Ergonomics of human-system interaction and Joint Technical Committee ISO/IEC JTC 1, Information

technology, Subcommittee SC 7, Software and systems engineering.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved
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SIST EN ISO 25065:2021
ISO 25065:2019(E)
Introduction

Specifying user requirements in a consistent manner will assist those developing and acquiring

interactive systems that are usable. The term "user requirements" is used in this document to refer

to user-system interaction requirements (that specify the required interaction to achieve intended

outcomes) and use-related quality requirements (expressed in terms of effectiveness, efficiency and

satisfaction). It describes a set of content elements for user requirements specifications as part of a

human-centred approach to design of an interactive system. A common industry format for a user

requirements specification is intended to assist human-centred design teams in specifying user

requirements for an interactive system.

The Common Industry Format (CIF) for usability is described in ISO/IEC TR 25060 and is part of the

SQuaRE series (ISO/IEC 25000–ISO/IEC 2509x) on systems and software product quality requirements

and evaluation.

Usability as used in the CIF standards refers to effectiveness, efficiency, and satisfaction as defined in

ISO 9241-11, where it is defined as an outcome of use, rather than as a product quality which is an

alternate use of the term also provided in ISO/IEC 25010.
CIF standards published or planned for include the following information items:
— usability test reports (see ISO/IEC 25062);
— context of use description (see ISO/IEC 25063);
— user needs report (see ISO/IEC 25064);
— user requirements specification (this document);
— usability evaluation report (see ISO/IEC 25066);

The CIF standards are part of the "Extension Division" of the ISO/IEC 25000 SQuaRE series. Table 1

presents an overview of the structure and the contents of the SQuaRE series.
Table 1 — Organization of the SQuaRE series
SQuaRE architecture and sub-projects

ISO/IEC 2503x: Quality ISO/IEC 2501x: Quality model division ISO/IEC 2504x: Quality

requirement division evaluation division
ISO/IEC 2500x: Quality management division
ISO/IEC 2502x: Quality measurement
ISO/IEC 2505x–ISO/IEC 2509x: SQuaRE extension division

— ISO/IEC 25051–2505x: Requirements for quality of Ready to Use Software Product (RUSP) division

— ISO/IEC 2506x: Common Industry Format (CIF) for Usability division
© ISO 2019 – All rights reserved v
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SIST EN ISO 25065:2021
ISO 25065:2019(E)

Figure 1 — Relationship of CIF documents to human-centred design in ISO 9241-210 and system

lifecycle processes in ISO/IEC/IEEE 15288

Figure 1 illustrates the interdependence of these CIF documents with the outputs of human-centred

design activities described in ISO 9241-210 as well as the corresponding system lifecycle processes

described in ISO/IEC/IEEE 15288. Standards listed in bold represent CIF process outputs. The figure

depicts the outputs of the activities as a set of intersecting circles. The circles overlap to represent that:

— human-centred design aims at satisfying user needs; and

— the activities are not separate, but rather, overlapping in time and scope; and

— the outcome of each activity provides the input to one or more other activities.

As each human-centred design activity can provide input to any other, there is no starting point, no

endpoint, or linear process intended.
vi © ISO 2019 – All rights reserved
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SIST EN ISO 25065:2021
ISO 25065:2019(E)

The human-centred design approach of ISO 9241-210 focuses on ensuring that systems are usable.

Human-centred design is enabled by the identification and communication of all of the relevant types of

information

NOTE ISO 9241-220 broadens the objectives of human-centred design to human-centred quality: usability,

accessibility, user experience and avoidance of harm from use. Human-centred quality can be achieved by

applying human-centred design throughout the lifecycle.

Human-centred design relies on user needs that are first identified based on the context of use

analysis. User needs are documented in the user needs report (ISO/IEC 25064). The user needs report

is an intermediate deliverable that links the context of use description (ISO/IEC 25063) containing

information about the users, their tasks and the organizational and physical environment, to the user

requirements. User requirements are, in turn, documented in the user requirements specification

(ISO 25065). These information items are developed as part of the stakeholders requirements definition

process described in ISO/IEC 15288.

The "designed solutions" activity focuses on designing user interaction that meets user requirements.

This activity takes place during the architectural design, implementation, and integration processes

described in ISO/IEC/IEEE 15288 and produces the information items "user interaction specification"

and the "user interface specification".

The "evaluation results" activity starts at the earliest stages in the project, evaluating design concepts

to obtain a better understanding of the user needs. Design solutions can be evaluated multiple times

as the interactive system is developed and can produce various types of evaluation reports. Usability

data, such as that described in ISO/IEC 25062, can support the ISO/IEC/IEEE 15288 validation process,

which confirms that the system complies with the stakeholders requirements.
© ISO 2019 – All rights reserved vii
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SIST EN ISO 25065:2021
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SIST EN ISO 25065:2021
INTERNATIONAL STANDARD ISO 25065:2019(E)
Systems and software engineering — Software product
Quality Requirements and Evaluation (SQuaRE) —
Common Industry Format (CIF) for Usability: User
requirements specification
1 Scope

This document provides a framework and consistent terminology for specifying user requirements. It

specifies the common industry format (CIF) for a user requirement specification including the content

elements and the format for stating those requirements.

NOTE 1 A user requirements specification is the formal documentation of a set of user requirements, which

aids in the development and evaluation of usable interactive systems.
In this document, user requirements refers to:

a) user-system interaction requirements for achieving intended outcomes (including requirements

for system outputs and their attributes);

b) use-related quality requirements that specify the quality criteria associated with the outcomes of

users interacting with the interactive system and can be used as criteria for system acceptance.

NOTE 2 ISO/IEC 25030 introduces the concept of quality requirements. The use-related quality requirements

in this document are a particular type of quality requirement.

The content elements of a user requirements specification are intended to be used as part of

documentation resulting from the activities specified in ISO 9241-210, and from human centred design

processes, such as those in ISO 9241-220.

This document is intended to be used by requirements engineers, business analysts, product managers,

product owners, and people acquiring systems from third parties.

The CIF series of standards addresses usability-related information (as described in ISO 9241-11 and

ISO/IEC TR 25060).

NOTE 3 In addition to usability, user requirements can include other perspectives, such as human-centred

quality introduced in ISO 9241-220, and other quality perspectives presented in ISO/IEC 25010, ISO/IEC TS 25011,

and ISO/IEC 25030.

NOTE 4 While this document was developed for interactive systems, the guidance can also be applied in other

domains.

This document does not prescribe any kind of method, lifecycle or process. The content elements of a

user requirements specification can be used in iterative development which includes the elaboration

and evolution of requirements (e.g. as in agile development).
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
© ISO 2019 – All rights reserved 1
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SIST EN ISO 25065:2021
ISO 25065:2019(E)

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1 Terms related to user requirements
3.1.1
requirement

condition or capability that must be met or possessed by a system, system component, product, or

service to satisfy an agreement, standard, specification, or other formally imposed documents

Note 1 to entry: Formally imposed documents can include User needs reports.

Note 2 to entry: This definition is used in this document because it explicitly differentiates between user needs

and user requirements which the ISO/IEC/IEEE 12207 definition does not explicitly differentiate.

[SOURCE: ISO/IEC/IEEE 24765:2017, 3.3431/2, modified — The Notes to entry have been added.]

3.1.2
quality requirement

requirement (3.1.1) for quality properties or attributes of a product, data or service that satisfy needs

which ensue from the purpose for which that product, data or service is to be used

[SOURCE: ISO/IEC DIS 25030:2018, 4.16, modified — Note 1 to entry has been deleted.]

3.1.3
user
person who interacts with a system, product or service

Note 1 to entry: Users of a system, product or service include people who operate the system, people who make

use of the output of the system and people who support the system (including providing maintenance and

training).

Note 2 to entry: This term corresponds to the definition "direct user" that is found in ISO/IEC 25010.

[SOURCE: ISO 9241-11:2018, 3.1.7, modified — Note 2 to entry has been added]
3.1.4
stakeholder

individual or organization having a right, share, claim or interest in a system or in its possession of

characteristics that meet their needs and expectations

Note 1 to entry: Stakeholders can include: users, purchasers, systems owners or managers and people who are

indirectly affected by the operation of a system, product or service.

Note 2 to entry: Different stakeholders can have different needs, requirements or expectations.

[SOURCE: ISO/IEC/IEEE 15288:2015, 4.1.44, modified — The Example has been removed, Note 1 to

entry has been replaced and Note 2 to entry has been added.]
3.1.5
user group

subset of intended users (3.1.2) who are differentiated from other intended users by characteristics of

the users, tasks (3.1.7) or environments that can influence usability (3.3.1)
[SOURCE: ISO 9241-11:2018, 3.1.8]
2 © ISO 2019 – All rights reserved
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SIST EN ISO 25065:2021
ISO 25065:2019(E)
3.1.6
context of use

combination of users (3.1.2), goals (3.1.6) and tasks (3.1.7), resources, and environment

Note 1 to entry: The "environment" in a context of use includes the technical, physical, social, cultural and

organizational environments.

Note 2 to entry: This can apply to an existing context of use or an intended context of use.

[SOURCE: ISO 9241-11:2018, 3.1.15, modified — Note 2 to entry has been added]
3.1.7
goal
intended outcome
[SOURCE: ISO 9241-11:2018, 3.1.10]
3.1.8
task
set of activities undertaken to achieve a specific goal (3.1.6)
Note 1 to entry: These activities can be physical, perceptual and/or cognitive.

Note 2 to entry: While goals are independent of the means used to achieve them, tasks describe particular means

of achieving goals.
[SOURCE: ISO 9241-11:2018, 3.1.11]
3.1.9
user need

prerequisite identified as necessary for a user (3.1.2), or a set of users, to achieve an intended outcome,

implied or stated within a specific context of use (3.1.5)

EXAMPLE 1 A presenter (user) needs to know how much time is left (prerequisite) in order to complete the

presentation in time (goal) during a presentation with a fixed time limit (context of use).

EXAMPLE 2 An account manager (user) needs to know the number of invoices received and their amounts

(prerequisite), in order to complete the daily accounting log (goal) as part of monitoring the cash flow (context

of use).

Note 1 to entry: A user need is independent of any proposed solution for that need.

Note 2 to entry: User needs are identified based on various approaches including interviews with users,

observations, surveys, evaluations, expert analysis, etc.

Note 3 to entry: User needs often represent gaps (or discrepancies) between what should be and what is.

Note 4 to entry: User needs are transformed into user requirements (3.1.10) considering the context of use, user

priorities, trade-offs with other system requirements and constraints.

[SOURCE: ISO/IEC 25064:2013, 4.19, modified — The expression "intended outcome" has been changed

to "goal" in Examples 1 and 2.]
3.1.10
user requirements

set of requirements (3.1.1) for use that provide the basis for design and evaluation of interactive systems

(3.2.1) to meet identified user needs (3.1.8)

Note 1 to entry: User requirements are derived from user needs and capabilities in order to allow the user to

make use of the system in an effective, efficient, safe and satisfying manner.
Note 2 to entry: User requirements are not requirements on the users.
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SIST EN ISO 25065:2021
ISO 25065:2019(E)

Note 3 to entry: User requirements include user-system interaction requirements (3.1.11) and use-related quality

requirements (3.1.12).

Note 4 to entry: In software engineering terms, user requirements include both "functional" and "non-functional"

requirements derived from user needs and capabilities.
[SOURCE: ISO 9241-220:2019, 3.46]
3.1.11
user-system interaction requirements

user requirements (3.1.10) that specify interactions (including: recognizing information, making inputs,

making selections, and receiving outputs) required by the users to achieve the goals (3.1.7)

3.1.12
use-related quality requirements

user requirements (3.1.10) that specify the intended outcomes of use of the interactive system and

associated quality criteria
3.2 Terms related to interactive systems
3.2.1
interactive system

combination of hardware and/or software and/or services and/or people that users (3.1.2) interact

with in order to achieve specific goals

Note 1 to entry: This includes, where appropriate, packaging, user documentation, on-line and human help,

support and training.

Note 2 to entry: This definition emphasizes that the user interacts with the system. An interactive system

provides feedback to user input and initiates further a
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