Systems and software engineering - Systems and software Quality Requirements and Evaluation (SQuaRE) - Common Industry Format (CIF) for Usability - Evaluation Report (ISO/IEC 25066:2016)

ISO/IEC 25066:2016 describes the Common Industry Format (CIF) for reporting usability evaluations. It provides a classification of evaluation approaches and the specifications for the content items (content elements) to be included in an evaluation report based on the selected evaluation approach(es). The intended users of the usability evaluation reports are identified, as well as the situations in which the usability evaluation report can be applied.
The usability evaluation reports in ISO/IEC 25066:2016 are applicable to software and hardware systems, products or services used for predefined tasks (excluding generic products, such as a display screen or a keyboard). The content elements are intended to be used as part of system-level documentation resulting from development processes such as those in ISO 9241‑210 and ISO/IEC JTC 1/SC 7 process standards.
The content elements for documenting evaluations can be integrated in any type of process model.
NOTE For the purpose of establishing process models, ISO/IEC TR 24774 and ISO/IEC 33020 specify the format and conformance requirements for process models, respectively. In addition, ISO/IEC 15289 defines the types and content of information items developed and used in process models for system and software lifecycle management. ISO/IEC 15504‑5 and ISO/IEC 15504‑6 (to be replaced by ISO/IEC 33060) define work products, including information items, for the purpose of process capability assessment. Process models and associated information items for human-centred design of interactive systems are contained in ISO/TR 18529 and ISO/TS 18152.

System- und Software-Engineering - Qualitätskriterien und Bewertung von Systemen und Softwareprodukten (SQuaRE) - Allgemeines Industrieformat (CIF) zur Gebrauchstauglichkeit: Evaluierungsberichte (ISO/IEC 25066:2016)

Diese Internationale Norm beschreibt das allgemeine Industrieformat (CIF; en: Common Industry Format) für Berichte über Gebrauchstauglichkeitsevaluierungen. Sie umfasst eine Klassifizierung von Evaluierungs¬ansätzen und die Spezifikationen für die Inhaltselemente, die, je nach den ausgewählten Evaluierungs¬ansätzen, in einen Evaluierungsbericht aufzunehmen sind. Die vorgesehenen Benutzer von Berichten über Gebrauchstauglichkeitsevaluierungen sind identifiziert, ebenso wie die Situationen, in denen ein Gebrauchs¬tauglichkeitsevaluierungsbericht angewendet werden kann.
Die in dieser Internationalen Norm beschriebenen Gebrauchstauglichkeitsevaluierungsberichte sind auf Software  und Hardware Systeme, Produkte oder Dienstleistungen anwendbar, die für vorgegebene Aufgaben eingesetzt werden (exklusive generischer Produkte wie Bildschirm oder Tastatur). Die Inhalts¬elemente sind zur Verwendung als Teil einer Dokumentation auf Systemebene vorgesehen, die das Ergebnis von Entwicklungsprozessen ist, wie sie in den Prozessnormen ISO 9241 210 und ISO/IEC JTC 1/SC 7 beschrieben sind.
Die Inhaltselemente für die Dokumentation von Evaluierungen können in alle Arten von Prozessmodellen integriert werden.
ANMERKUNG   Zum Zweck der Etablierung von Prozessmodellen werden in ISO/IEC TR 24774 und ISO/IEC 33020 das Format bzw. die Konformitätsanforderungen für Prozessmodelle spezifiziert. Darüber hinaus werden in ISO/IEC 15289 Arten und Inhalt der Informationsformen definiert, die in den Prozessmodellen für das System  und Software Lebenszyklus Management entwickelt und verwendet werden. In ISO/IEC 15504 5 und ISO/IEC 15504 6 (wird ersetzt durch ISO/IEC 33060) werden Arbeitsprodukte, inklusive Informationsformen, zum Zweck der Prozessleistungs¬bewertung definiert. Prozessmodelle und dazugehörige Informationsformen für die menschzentrierte Gestaltung von interaktiven Systemen sind in ISO/TR 18529 bzw. ISO/TS 18152 enthalten.

Ingénierie des systèmes et du logiciel - Exigences de qualité et évaluation des systèmes et du logiciel (SQuaRE) - Format de l'industrie commune pour l'utilisation - Rapport d'évaluation (ISO/IEC 25066:2016)

La présente Norme internationale décrit le Format commun de l'industrie (CIF) pour l'élaboration de rapports sur les évaluations d'utilisabilité. Elle fournit une classification des approches d'évaluation et les spécifications relatives aux éléments du contenu devant être inclus dans le rapport d'évaluation en fonction de l'approche ou des approches de l'évaluation sélectionnée. Les utilisateurs potentiels des rapports d'évaluation de l'utilisabilité ainsi que les situations auxquelles le rapport d'évaluation de l'utilisabilité peut être appliqué sont identifiés.
Les rapports d'évaluation de l'utilisabilité de cette Norme internationale s'appliquent aux systèmes, produits ou services logiciels et matériels utilisés dans le cadre de tâches prédéfinies (à l'exception des produits génériques, tels qu'un écran d'affichage ou un clavier). Les éléments du contenu sont destinés à être utilisés dans le cadre de documents relatifs au niveau système, résultant des processus de développement tels que ceux figurant dans l'ISO 9241‑210 et dans les normes de processus de l'ISO/IEC JTC 1/SC 7.
Les éléments du contenu des évaluations de documentation peuvent être intégrés dans tous les types de modèles de processus.
NOTE En vue d'établir des modèles de processus, l'ISO/IEC TR 24774 et l'ISO/IEC 33020 spécifient respectivement les exigences de format et de conformité applicables aux modèles de processus. En outre, l'ISO/IEC 15289 définit les types et le contenu des éléments d'information élaborés et utilisés dans les modèles de processus dans le cadre de la gestion du cycle de vie du système et du logiciel. L'ISO/IEC 15504‑5 et l'ISO/IEC 15504‑6 (à remplacer par l'ISO/IEC 33060) définissent les produits fabriqués, y compris les éléments d'information, à des fins d'évaluation de la capacité des procédés (ou processus). Les modèles de processus et les éléments d'information associés à la conception centrée sur l'opérateur humain des systèmes interactifs sont contenus dans l'ISO/TR 18529 et l'ISO/TS 18152.

Sistemi in programska oprema - Zahteve za kakovost in vrednotenje sistemov in programske opreme (SQuaRE) - Skupni industrijski format (CIF) za uporabnost - Poročilo o vrednotenju (ISO/IEC 25066:2016)

General Information

Status
Published
Public Enquiry End Date
30-Jul-2019
Publication Date
09-Mar-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
10-Oct-2019
Due Date
15-Dec-2019
Completion Date
10-Mar-2020

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SLOVENSKI STANDARD
SIST EN ISO 25066:2020
01-april-2020
Sistemi in programska oprema - Zahteve za kakovost in vrednotenje sistemov in
programske opreme (SQuaRE) - Skupni industrijski format (CIF) za uporabnost -
Poročilo o vrednotenju (ISO/IEC 25066:2016)
Systems and software engineering - Systems and software Quality Requirements and

Evaluation (SQuaRE) - Common Industry Format (CIF) for Usability - Evaluation Report

(ISO/IEC 25066:2016)
System- und Software-Engineering - Qualitätskriterien und Bewertung von Systemen
und Softwareprodukten (SQuaRE) - Allgemeines Industrieformat (CIF) zur
Gebrauchstauglichkeit: Evaluierungsberichte (ISO/IEC 25066:2016)

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

et du logiciel (SQuaRE) - Format de l'industrie commune pour l'utilisation - Rapport

d'évaluation (ISO/IEC 25066:2016)
Ta slovenski standard je istoveten z: EN ISO/IEC 25066:2019
ICS:
35.080 Programska oprema Software
SIST EN ISO 25066:2020 en,fr,de

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

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SIST EN ISO 25066:2020
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SIST EN ISO 25066:2020
EN ISO 25066
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2019
EUROPÄISCHE NORM
ICS 35.080
English Version
Systems and software engineering - Systems and software
Quality Requirements and Evaluation (SQuaRE) - Common
Industry Format (CIF) for Usability - Evaluation Report
(ISO/IEC 25066:2016)

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

qualité et évaluation des systèmes et du logiciel und Bewertung von Systemen und Softwareprodukten

(SQuaRE) - Format de l'industrie commune pour (SQuaRE) - Allgemeines Industrieformat (CIF) zur

l'utilisation - Rapport d'évaluation (ISO/IEC Gebrauchstauglichkeit: Evaluierungsberichte (ISO/IEC

25066:2016) 25066:2016)
This European Standard was approved by CEN on 12 August 2019.

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

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 25066:2019 E

worldwide for CEN national Members.
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SIST EN ISO 25066:2020
EN ISO 25066:2019 (E)
Contents Page

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

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SIST EN ISO 25066:2020
EN ISO 25066:2019 (E)
European foreword

The text of ISO/IEC 25066:2016 has been prepared by Technical Committee ISO/IEC JTC 1 "Information

technology” of the International Organization for Standardization (ISO) and has been taken over as

EN ISO 25066:2019 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 April 2020, and conflicting national standards shall be

withdrawn at the latest by April 2020.

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/IEC 25066:2016 has been approved by CEN as EN ISO 25066:2019 without any

modification.
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SIST EN ISO 25066:2020
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SIST EN ISO 25066:2020
INTERNATIONAL ISO/IEC
STANDARD 25066
First edition
2016-06-15
Systems and software engineering —
Systems and software Quality
Requirements and Evaluation
(SQuaRE) — Common Industry Format
(CIF) for Usability — Evaluation Report
Ingénierie des systèmes et du logiciel — Exigences de qualité et
évaluation des systèmes et du logiciel (SQuaRE) — Format de
l’industrie commune pour l’utilisation — Rapport d’évaluation
Reference number
ISO/IEC 25066:2016(E)
ISO/IEC 2016
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SIST EN ISO 25066:2020
ISO/IEC 25066:2016(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2016, Published in Switzerland

All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO/IEC 2016 – All rights reserved
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SIST EN ISO 25066:2020
ISO/IEC 25066:2016(E)
Contents Page

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

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

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

2 Conformance ............................................................................................................................................................................................................. 1

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

4 Purpose and types of usability evaluations .............................................................................................................................. 6

4.1 Purpose of an evaluation ................................................................................................................................................................ 6

4.2 Types of usability evaluations ................................................................................................................................................... 6

4.3 Assessing conformity of the object of evaluation against specified criteria ...................................... 7

5 Content elements of usability evaluation reports ............................................................................................................. 9

5.1 Selecting content elements ........................................................................................................................................................... 9

5.2 Description of the content elements for each type of evaluation .............................................................10

5.2.1 Executive summary (if used) ..............................................................................................................................10

5.2.2 Description of the object of evaluation ......................................................................................................10

5.2.3 Purpose of the evaluation .....................................................................................................................................11

5.2.4 Method ...................................................................................................................................................................................12

5.2.5 Procedure ............................................................................................................................................................................17

5.2.6 Results ....................................................................................................................................................................................22

5.2.7 Interpretation of results and recommendations ...............................................................................24

5.2.8 Additional content for conformity assessment (as part of a usability

evaluation report) ........................................................................................................................................................25

Annex A (normative) Overview on required and recommended content elements for each

type of evaluation .............................................................................................................................................................................................26

Annex B (informative) Usability test report example ......................................................................................................................29

Bibliography .............................................................................................................................................................................................................................37

© ISO/IEC 2016 – All rights reserved iii
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SIST EN ISO 25066:2020
ISO/IEC 25066:2016(E)
Foreword

ISO (the International Organization for Standardization) and IEC (the International Electrotechnical

Commission) form the specialized system for worldwide standardization. National bodies that are

members of ISO or IEC participate in the development of International Standards through technical

committees established by the respective organization to deal with particular fields of technical

activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international

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

work. In the field of information technology, ISO and IEC have established a joint technical committee,

ISO/IEC JTC 1.

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 document 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 and IEC 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 on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO’s adherence to the WTO principles in the Technical

Barriers to Trade (TBT), see the following URL: Foreword — Supplementary information.

The committee responsible for this document is 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 system engineering.
iv © ISO/IEC 2016 – All rights reserved
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SIST EN ISO 25066:2020
ISO/IEC 25066:2016(E)
Introduction

The human-centred design approach of ISO 9241-210 is well established and focuses specifically on

making systems usable. Usability can be achieved by applying human-centred design throughout

the lifecycle. In order to enable a human-centred approach to be adopted, it is important that all the

relevant types of information related to usability (information items) are identified and communicated.

The identification and communication of relevant types of information related to usability enables the

design and testing of the usability of a system.

This International Standard provides a framework and consistent terminology for reporting the

evaluation of an interactive system. It is intended to assist usability specialists and developers in

documenting and communicating usability-related information as part of the system development

lifecycle.

The Common Industry Format (CIF) for Usability family of International Standards is described

in ISO/IEC TR 25060 and is part of the SQuaRE (Systems and software Quality Requirements and

Evaluation) series of standards on systems and software product quality requirements and evaluation

1) 2) 3)

(ISO/IEC 25000 , ISO/IEC 25001, ISO/IEC 25021 , ISO/IEC 25023 , ISO/IEC 25040, ISO/IEC 25041 and

ISO/IEC 25051).

The CIF family of standards uses definitions that are consistent with the ISO 9241 series of standards

(Ergonomics of human-system interaction), as this is the terminology that is normally used for this

subject matter. In some cases, these definitions differ from those in ISO/IEC 25000.

CIF standards are published or planned for the following information items:
— Common Industry Format (CIF) for usability test reports (ISO/IEC 25062);

NOTE ISO/IEC 25062 provides more detail for the content of a user observation report for performance

measurement.
— Context of use description (ISO/IEC 25063);
— User needs report (ISO/IEC 25064);
— User requirements specification (ISO/IEC 25065);
— Evaluation reports (ISO/IEC 25066);
— User interaction specification (planned);
— User interface specification (planned);
— Field data report (planned).

The CIF standards are part of the “Extension Division” of the ISO/IEC 25000 SQuaRE series of

International Standards. Table 1 presents an overview of the structure and the contents of the SQuaRE

series of International Standards.
1) Withdrawn.
2) Withdrawn.
3) Under development.
© ISO/IEC 2016 – All rights reserved v
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SIST EN ISO 25066:2020
ISO/IEC 25066:2016(E)
Table 1 — Organization of SQuaRE series of International Standards
SQuaRE Architecture and Sub-projects
ISO/IEC 2501n: Quality
Model Division
ISO/IEC 2503n: Quality ISO/IEC 2500n: Quality ISO/IEC 2504n: Quality
Requirement Division Management Division Evaluation Division
ISO/IEC 2502n: Quality
Measurement Division
ISO/IEC 25050 – 25099 SQuaRE Extension Division
ISO/IEC 25051: Requirements for quality

of Ready to Use Software Product (RUSP) ISO/IEC 2506n Common Industry Format Division

and instructions for testing

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

lifecycle processes in ISO/IEC 15288

Figure 1 illustrates the interdependence of these information items with the human-centred design

activities described in ISO 9241-210, as well as the corresponding System Life Cycle processes described

in ISO/IEC 15288 .
The following discussion also serves as alternative text for the figure.

The figure depicts the activities as a set of intersecting circles. The circles overlap to represent that 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, no starting point, end point, or linear process is intended.
4) Withdrawn. Replaced with ISO/IEC/IEEE 15288:2015.
vi © ISO/IEC 2016 – All rights reserved
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SIST EN ISO 25066:2020
ISO/IEC 25066:2016(E)

The human-centred design is composed of four interacting activities represented as overlapping circles

in the diagram where User Needs are at the centre.

The first activity involves Context of Use. Human-centred design relies on user needs that are first

identified during of the Context of Use analysis. User needs are documented in the User needs report

(ISO/IEC 25064), which is an intermediate deliverable that links the Context of Use Description

(ISO/IEC 25063) that contains information about the users, their tasks and the organizational and

physical environment, to the user requirements. These items are developed during the Stakeholders

requirements definition process described in ISO/IEC 15288.

The second activity involves Derived Requirements. The User requirements specification

(ISO/IEC 25065) provides the basis for design and evaluation of interactive systems to meet the user

needs. User requirements are developed in conjunction with and from part of the overall requirements

specification of an interactive system.

The third activity involves Designed Solutions. The “Produce design 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 15288 and

produces the information items “User interaction specification” and the “User interface specification”.

The fourth activity involves Evaluation Results. The “Evaluate” 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 being developed and can produce

various types of evaluation reports and usability data such as that described in ISO/IEC 25062. These

evaluations can support the ISO/IEC 15288 Validation Process that confirms that the system complies

with the stakeholders’ requirements.
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SIST EN ISO 25066:2020
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SIST EN ISO 25066:2020
INTERNATIONAL STANDARD ISO/IEC 25066:2016(E)
Systems and software engineering — Systems and software
Quality Requirements and Evaluation (SQuaRE) — Common
Industry Format (CIF) for Usability — Evaluation Report
1 Scope

This International Standard describes the Common Industry Format (CIF) for reporting usability

evaluations. It provides a classification of evaluation approaches and the specifications for the content

items (content elements) to be included in an evaluation report based on the selected evaluation

approach(es). The intended users of the usability evaluation reports are identified, as well as the

situations in which the usability evaluation report can be applied.

The usability evaluation reports in this International Standard are applicable to software and

hardware systems, products or services used for predefined tasks (excluding generic products, such

as a display screen or a keyboard). The content elements are intended to be used as part of system-

level documentation resulting from development processes such as those in ISO 9241-210 and

ISO/IEC JTC 1/SC 7 process standards.

The content elements for documenting evaluations can be integrated in any type of process model.

NOTE For the purpose of establishing process models, ISO/IEC TR 24774 and ISO/IEC 33020 specify the

format and conformance requirements for process models, respectively. In addition, ISO/IEC 15289 defines

the types and content of information items developed and used in process models for system and software

lifecycle management. ISO/IEC 15504-5 and ISO/IEC 15504-6 (to be replaced by ISO/IEC 33060) define work

products, including information items, for the purpose of process capability assessment. Process models and

associated information items for human-centred design of interactive systems are contained in ISO/TR 18529

and ISO/TS 18152.
2 Conformance

An evaluation report conforms to this International Standard if it contains all the required content

elements in Clause 5 that are applicable to the type(s) of evaluation, including:

— additional optional content elements that were selected to be part of the evaluation;

— the content elements for the conformity assessment (if used).
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

NOTE The CIF family of standards uses definitions that are consistent with the ISO 9241 series of standards,

as this is the terminology that is normally used for this subject matter. In some cases, these definitions differ

from those in ISO/IEC 25000.
3.1
accessibility

extent to which products, systems, services, environments and facilities can be used by people from

a population with the widest range of characteristics and capabilities to achieve a specified goal in a

specified context of use

Note 1 to entry: Context of use includes direct use or use supported by assistive technologies.

[SOURCE: ISO 26800:2011, 2.1; modified, Note 2 to entry deleted]
© ISO/IEC 2016 – All rights reserved 1
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SIST EN ISO 25066:2020
ISO/IEC 25066:2016(E)
3.2
action
user behaviour that a system accepts as a request for a particular operation
[SOURCE: ISO/IEC TR 11580:2007, 2.3; modified, Example deleted]
3.3
conformity assessment

demonstration that specified requirements relating to a product, process, system, person or body are

fulfilled
[SOURCE: ISO/IEC 17000:2004, 2.1; modified, Notes deleted]
3.4
context of use

users, tasks, equipment (hardware, software and materials), and the physical and social environments

in which a product is used
[SOURCE: ISO 9241-11:1998, 3.5]
3.5
dialogue

interaction between a user and an interactive system as a sequence of user actions (inputs) and system

responses (outputs) in order to achieve a goal

Note 1 to entry: User actions include not only entry of data but also navigational actions of the user.

Note 2 to entry: Dialogue refers to both the form (syntax) and the meaning (semantics) of interaction.

[SOURCE: ISO 9241-110:2006, 3.2]
3.6
effectiveness
accuracy and completeness with which users achieve specified goals
[SOURCE: ISO 9241-11:1998, 3.2]
3.7
efficiency

resources expended in relation to the accuracy and completeness with which users achieve goals

[SOURCE: ISO 9241-11:1998, 3.3]
3.8
goal
intended outcome
[SOURCE: ISO 9241-11:1998, 3.8]
3.9
information item

separately identifiable body of information that is produced and stored for human use during a system

or software life cycle
[SOURCE: ISO/IEC/IEEE 15289:2011, 5.7]
3.10
inspection-based evaluation

evaluation based on the judgment of one or more evaluator(s) who examine or use a system to identify

potential usability problems (including deviations from established criteria)

Note 1 to entry: The evaluators making the inspections typically are usability specialists but can also include end

users and members of the design team.
2 © ISO/IEC 2016 – All rights reserved
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SIST EN ISO 25066:2020
ISO/IEC 25066:2016(E)

Note 2 to entry: Established criteria typically include user requirements, usability guidelines in standards,

design conventions contained in manufacturer guidelines and style guides, task models to be supported, as well

as standardized principles.

Note 3 to entry: The evaluation can be conducted with or without the help of reference documents.

Note 4 to entry: Inspection-based evaluation is a generic term for methods that include but are not limited to

heuristic evaluation, cognitive walkthroughs, standards inspection, pluralistic walkthroughs, and consistency

inspections.

Note 5 to entry: Inspection-based evaluation can be conducted by machines in some cases, e.g. when consistency

with required terminology is being evaluated. In this case, the machine represents the evaluator.

3.11
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

[SOURCE: ISO/IEC/IEEE 24765:2010, 3.2506, Clause 4.]
3.12
satisfaction
freedom from discomfort, and positive attitudes towards the use of the product
[SOURCE: ISO 9241-11:1998, 3.4]
3.13
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
[SOURCE: ISO/IEC/IEEE 15288:2015, 4.1.44]
3.14
system

combination of interacting elements organized to achieve one or more stated purposes

Note 1 to entry: A system may be considered as a product or as the services it provides.

Note 2 to entry: In practice, the interpretation of its meaning is frequently clarified by the use of an associative

noun, e.g. aircraft system. Alternatively, the word system may be substituted simply by a context dependent

synonym, e.g. aircraft, though this may then obscure a system principles perspective.

[SOURCE: ISO/IEC/IEEE 15288:2015, 4.1.46; modified, Note 3 to entry deleted]
3.15
task
activities required to achieve a goal

Note 1 to entry: The term “task” is used here, as in ISO 9241-11:— , in its widest sense, rather than in reference

to the specifics of use of the dialogue system.
[SOURCE: ISO 9241-11:1998, 3.9; modified, Notes changed]
3.16
usability

extent to which a system, product or service can be used by specified users to achieve specified goals

with effectiveness, efficiency and satisfaction in a specified context of use

Note 1 to entry: According to ISO/IEC 25010, “Usability can either be specified or measured as a product quality

characteristic in terms of its sub-characteristics, or specified or measured directly by measures that are a subset

of quality in use.” The definition of usability in this International Standard is consistent with the second approach.

5) Under preparation.
© ISO/IEC 2016 – All rights reserved 3
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SIST EN ISO 25066:2020
ISO/IEC 25066:2016(E)
[SOURCE: ISO 9241-210:2010, 2.13; modified, Notes changed]
3.17
usability defect

product attribute(s) that lead(s) to a mismatch between user intentions and/or user actions and the

system attributes and behaviour
Note 1 to entry: Typical usability defects include the following:
— additional unnecessary steps not required as part of completing a task;
— misleading information;
— insufficient and/or poor information on the user interface;
— unexpected system responses;
— limitations in navigation;
— inefficient use error recovery mechanisms;

— physical characteristics of the user interface that are not suitable for the physical characteristics of the user.

Note 2 to entry: Deviations of product attributes of the object of evaluation from established criteria are also

usability defects.
3.18
usability finding

identified usability defect and/or usability problem or positive usability-related attribute

3.19
usability problem
situation during use resulting in poor effectiveness, efficiency or satisfaction
3.20
use error

user action or lack of user action while using the interactive system that leads to a different result than

that intended by the manufacturer or expected by the user

Note 1 to entry: Use error includes the inability of the user to complete a task.

Note 2 to entry: Use errors can result from a mismatch between the characteristics of the user, user interface,

task, or use environment.
Note 3 to entry: Users might be aware or unaware that a use error has occurred.

Note 4 to entry: An unexpected physiological response of the patient is not by itself considered a use error.

Note 5 to entry: A malfunction of an interactive system that causes an unexpected result is not considered a

use error.

[SOURCE: IEC 62366-1:2015, 3.21; modified, Medical device replaced by interactive system, Notes

changed]
3.21
...

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