SIST EN ISO 9241-1:2001/A1:2002

SLOVENSKI STANDARD
01-januar-2002
Ergonomske zahteve za pisarniško delo s slikovno zaslonsko opremo - 1. del:
Splošni uvod - Dopolnilo A1 (ISO 9241-1:1997/Amd.1:2001)
Ergonomic requirements for office work with visual display terminals (VDTs) - Part 1:
General introduction (ISO 9241-1:1997/Amd.1:2001)
Ergonomische Anforderungen für Bürotätigkeiten mit Bildschirmgeräten - Allgemeine
Einführung (ISO 9241-1:1997/Amd.1:2001)
Exigences ergonomiques pour travail de bureau avec terminaux a écrans de
visualisation (TEV) - Partie 1: Introduction générale - Amendement 1: Description et
applications des parties traitant des logiciels (Partie 10 a partie 17) (ISO 9241-
1:1997/Amd.1:2001)
Ta slovenski standard je istoveten z: EN ISO 9241-1:1997/A1:2001
ICS:
13.180 Ergonomija Ergonomics
35.180 Terminalska in druga IT Terminal and other
periferna oprema IT peripheral equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 9241-1:1997/A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2001
ICS 13.180; 35.180
English version
Ergonomic requirements for office work with visual display
terminals (VDTs) - Part 1: General introduction (ISO 9241-
1:1997/AM 1:2001)
Exigences ergonomiques pour travail de bureau avec
terminaux à écrans de visualisation (TEV) - Partie 1:
Introduction générale (ISO 9241-1:1997/AM 1:2001)
This amendment A1 modifies the European Standard EN ISO 9241-1:1997; it was approved by CEN on 1 March 2001.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this
amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references concerning such
national standards may be obtained on application to the Management Centre or to any CEN member.
This amendment 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 Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9241-1:1997/A1:2001 E
worldwide for CEN national Members.

Page 2
Foreword
The text of this Amendment EN ISO 9241-1:1997/A1:2001 to the EN ISO 9241-1:1997 from
Technical Committee ISO/TC 159 "Ergonomics" of the International Organization for
Standardization (ISO) has been taken over as an Amendment to the European Standard by
CMC.
This Amendment to the European Standard EN ISO 9241-1:1997 shall be given the status of
a national standard, either by publication of an identical text or by endorsement, at the latest
by September 2001, and conflicting national standards shall be withdrawn at the latest by
September 2001.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United
Kingdom.
NOTE FROM CMC: The foreword is susceptible to be amended on reception of the German
language version. The confirmed or amended foreword, and when appropriate, the normative
annex ZA for the references to international publications with their relevant European
publications will be circulated with the German version.
Endorsement notice
The text of the Amendment to the International Standard ISO 9241-1:1997/AM 1:2001 has
been approved by CEN as an Amendment to the European Standard without any
modification.
INTERNATIONAL ISO
STANDARD 9241-1
Second edition
1997-06-01
AMENDMENT 1
2001-03-01
Ergonomic requirements for office work
with visual display terminals (VDTs) —
Part 1:
General introduction
AMENDMENT 1
Exigences ergonomiques pour travail de bureau avec terminaux à écrans
de visualisation (TEV) —
Partie 1: Introduction générale
AMENDEMENT 1
Reference number
ISO 9241-1:1997/Amd.1:2001(E)
©
ISO 2001
ISO 9241-1:1997/Amd.1:2001(E)
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ii © ISO 2001 – All rights reserved

ISO 9241-1:1997/Amd.1:2001(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this Amendment may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
Amendment 1 to International Standard ISO 9241-1:1997 was prepared by Technical Committee ISO/TC 159,
Ergonomics, Subcommittee SC 4, Ergonomics of human-system interaction.
ISO 9241-1:1997/Amd.1:2001(E)
Introduction
ISO 9241 covers both the hardware and software ergonomic aspects of the use of visual display terminals. The
individual parts of ISO 9241, their interrelationships, and the expected users of the parts are described in the main
body of ISO 9241-1.
This Amendment deals particularly with the software parts of ISO 9241, i.e. ISO 9241-10 to ISO 9241-17. These
parts are concerned with the ergonomic design of software user interfaces.
The goal of this Amendment (complementing ISO 9241-1) is to help readers of ISO 9241-10 to ISO 9241-17 in
� gaining an overview on the content of ISO 9241-10 to ISO 9241-17,
� understanding the relationship between the individual software parts of ISO 9241,
� providing guidance on the relevance of individual parts to the development process, i.e. understanding where
and when to use the software parts of ISO 9241,
� understanding how to select and combine dialogue techniques which are described in ISO 9241-14 to
ISO 9241-17.
The ultimate beneficiary of ISO 9241-10 to ISO 9241-17 will be the end user at the VDT. It was the needs of these
users that provided the ergonomic recommendations in ISO 9241-10 to ISO 9241-17. Although it is unlikely that the
end user will read ISO 9241 or even know of its existence, its application should provide user interfaces that are
more usable, consistent and that enable greater productivity.
iv © ISO 2001 – All rights reserved

ISO 9241-1:1997/Amd.1:2001(E)
Ergonomic requirements for office work with visual display
terminals (VDTs) —
Part 1:
General introduction
AMENDMENT 1
1 Scope
Page ii
Replace the Contents with the following text.
Contents
Foreword.iii
Introduction.iv
1 Scope .1
2 Normative reference .1
3 Definitions .1
4 General introduction to ISO 9241.2
4.1 Purpose and intended users .2
4.2 Product specifications, technological change and the user-performance approach .2
5 Structure of ISO 9241 .2
6 Guidance on use of ISO 9241 .4
7 Reporting conformance to parts of ISO 9241 .6
Annex A (informative) Description and application of software parts in ISO 9241-10 to ISO 9241-17.7
Bibliography.17
Page 5
At the end of clause 6, add the following paragraph.
Annex A provides guidance on the use of ISO 9241-10 to ISO 9241-17 in the development of software applications,
and on the selection and combination of the dialogue techniques covered in ISO 9241-14 to ISO 9241-17.
ISO 9241-1:1997/Amd.1:2001(E)
Page 7
Delete “Annex A (informative)” and transfer the bibliography to the page after the new annex A.
Page 7
Add the following new annex A.
2 © ISO 2001 – All rights reserved

ISO 9241-1:1997/Amd.1:2001(E)
Annex A
(informative)
Description and application of software parts (in ISO 9241-10 to ISO 9241-17)
A.1 Structure of ISO 9241-10 to ISO 9241-17
A.1.1 Introduction
ISO 9241-10 to ISO 9241-17 cover software ergonomics issues such as:
� principles for human-computer dialogues (ISO 9241-10);
� the relevance of the context of use (users, tasks, environment) and the definition of usability in terms of
effectiveness, efficiency and satisfaction (ISO 9241-11);
� characteristics of presented information and recommendations for the presentation of information (ISO 9241-12);
� recommendations for user guidance; these apply to all dialogue techniques (ISO 9241-13);
� recommendations for the usage of dialogue techniques (ISO 9241-14 to ISO 9241-17).
The specification or design of human-computer dialogues should be driven by an understanding of the
requirements of the users, their tasks, the environment and the available technology. There are usually several
options and the final choice may be influenced by the desire for consistency (e.g. with existing organizational
practices or across a range of systems). Decisions about the overall suitability of human-computer dialogues can
be assisted by reference to standards containing general principles of dialogue design i.e. ISO 9241-10. Specific
recommendations for dialogue design are addressed in ISO 9241-14 to ISO 9241-17.
A.1.2 Relationship between ISO 9241-10 to ISO 9241-17
Figure A.1 illustrates the structure of ISO 9241-10 to ISO 9241-17, reflecting the nature of the individual parts in
terms of principles and recommendations.
ISO 9241-1:1997/Amd.1:2001(E)
Figure A.1 — Relationship of the software parts of ISO 9241
A.1.3 ISO 9241-10 “Dialogue principles”
The purpose of ISO 9241-10 is to present high-level ergonomic principles that apply to the design of dialogues
between humans and information systems. ISO 9241-10 provides seven principles of good practice for the design
of the dialogue between the user and the interface software.
These seven principles are:
� suitability for the task;
� self-descriptiveness;
� controllability;
� conformity with user expectations;
� error tolerance;
� suitability for individualization;
� suitability for learning.
The principles given in ISO 9241-10 form the basis for understanding any specific software-ergonomic
recommendation given in other parts of ISO 9241. These principles do not permit strict compliance checking,
although it may be possible to evaluate whether these principles have been generally applied.
4 © ISO 2001 – All rights reserved

ISO 9241-1:1997/Amd.1:2001(E)
A.1.4 ISO 9241-11 “Guidance on usability”
ISO 9241-11 introduces the concept of usability, but does not contain specific recommendations in terms of product
attributes. It is concerned with the extent to which the users of products are able to achieve specified goals
effectively, efficiently and with satisfaction in a given context of use (users, tasks and environment). This framework
can be used as part of an ergonomics requirements specification. It includes descriptions of the context of use, the
evaluation procedures to be carried out and the criterion measures to be satisfied when the usability of the system
is to be evaluated.
A.1.5 Structure within ISO 9241-12 to ISO 9241-17
A.1.5.1 Structural organization
The following structure applies to each of these ISO 9241 parts.
� Foreword
� Introduction
� Scope
� Normative references
� Definitions
� Application clause
� Recommendations
� Annexes
A.1.5.2 Application clause
Within the application clause of ISO 9241-12 to ISO 9241-17 the appropriateness of the specific part is explained in
terms of
� user and organizational characteristics,
� task characteristics,
� system capabilities.
NOTE More details are provided on these characteristics in A.3.2.
The application clause also explains how the recommendations given in the standard should be applied. Each
recommendation should be evaluated for its applicability and, if judged to be applicable, should be implemented in
the relevant dialogue technique unless there is evidence that to do so would cause deviation from the design
objectives or would result in an overall degradation in usability.
Furthermore, each part of ISO 9241-12 to ISO 9241-17 states: “if a product is claimed to have met the applicable
recommendations in this part of ISO 9241, the procedure used in establishing requirements for, developing, and/or
evaluating the […] shall be specified. The level of specification of the procedure is a matter of negotiation between
the involved parties”.
ISO 9241-1:1997/Amd.1:2001(E)
A.1.5.3 Recommendations clause
The recommendations clause within each part of ISO 9241-12 to ISO 9241-17 contains the recommendations of
the particular part of ISO 9241. Many of these recommendations are conditional recommendations (or “if”
statements). Often the “if” statement refers to the context of use [e.g. in ISO 9241-14, “If appropriate for the task, in
deeply structured menus (more than 3 levels), users should be provided with the capability to go from one part
(node) of the structure to another without returning to the initial common node”].
A.1.5.4 Annexes
Annex A within ISO 9241-12 to ISO 9241-17 provides an example of a procedure for determining whether the
applicable recommendations in the particular part of ISO 9241 have been met. It should be noted that the
procedure described is provided as guidance and is not a rigid process to be used as a substitute for the standard
itself. This procedure provides a two-stage process for determining which recommendations are relevant, and for
determining whether those relevant recommendations have been adhered to.
Annex B of ISO 9241-14 gives examples of application.
In addition, ISO 9241-12 to ISO 9241-17 each contain a bibliography with source documents on which each
standard is based.
A.1.6 ISO 9241-12 “Presentation of information”
ISO 9241-12 introduces characteristics of presented information. These characteristics are the following:
� Clarity (the information content is conveyed quickly and accurately);
� Discriminability (the displayed information can be distinguished accurately);
� Conciseness (users are given only the information necessary to accomplish the task);
� Consistency (the same information is presented in the same way throughout the application, according to the
user’s expectation);
� Detectability (user’s attention is directed towards information required);
� Legibility (information is easy to read);
� Comprehensibility (meaning is clearly understandable, unambiguous, interpretable and recognizable).
The characteristics of presented information given in ISO 9241-12 apply to visual design aspects of user guidance
(see A.1.7) and any specific dialogue techniques (see A.1.8) employed in a software package. ISO 9241-12 also
gives recommendations on the presentation of informati
...