SIST EN 62559-2:2015

SLOVENSKI STANDARD
SIST EN 62559-2:2015
01-september-2015
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Use case methodology - Part 2: Definition of use case template, actor list and
requirement list
Anwendungsfallmethodik - Teil 2: Definition der Anwendungsfallvorlage, Akteurliste und
der Anforderungsliste
Méthodologie des cas d'utilisation - Partie 2: Définition du formulaire type de modèle de
cas d'utilisation, de la liste d'acteurs et de la liste d'exigences
Ta slovenski standard je istoveten z: EN 62559-2:2015
ICS:
29.020 Elektrotehnika na splošno Electrical engineering in
general
SIST EN 62559-2:2015 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD EN 62559-2

NORME EUROPÉENNE

EUROPÄISCHE NORM
June 2015
ICS 29.020

English Version
Use case methodology - Part 2: Definition of the template for use
cases, actor list and requirements list
(IEC 62559-2:2015)
Méthodologie des cas d'utilisation - Partie 2: Définition du Anwendungsfallmethodik - Teil 2: Definition der
formulaire type de modèle de cas d'utilisation, de la liste Anwendungsfallvorlage, Akteurliste und der
d'acteurs et de la liste d'exigences Anforderungsliste
(IEC 62559-2:2015) (IEC 62559-2:2015)
This European Standard was approved by CENELEC on 2015-06-04. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.



European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
1
 Ref. No. EN 62559-2:2015 E

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EN 62559-2:2015
European foreword
The text of document 8/1389/FDIS, future edition 1 of IEC 62559-2, prepared by IEC TC 8, "Systems
aspects for electrical energy supply" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 62559-2:2015.

The following dates are fixed:
(dop) 2016-03-04
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2018-06-04
standards conflicting with the
document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
Endorsement notice
The text of the International Standard IEC 62559-2:2015 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 61850 (Series) NOTE Harmonized as EN 61850 (Series).
IEC 61968-1 NOTE Harmonized as EN 61968-1.
IEC 61968-11 NOTE Harmonized as EN 61968-11.
IEC 61968-100:2013 NOTE Harmonized as EN 61968-100:2013.
IEC 61970-301 NOTE Harmonized as EN 61970-301.
IEC 62056 (Series) NOTE Harmonized as EN 62056 (Series).
IEC 62325-301 NOTE Harmonized as EN 62325-301.
IEC 62507-1:2010 NOTE Harmonized as EN 62507-1:2011.

2

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EN 62559-2:2015

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year

IEC 60870-5-10x Telecontrol equipment and systems -- Part EN 60870-5-10x series
5: Transmission protocols
IEC 61850 series Communication networks and systems for EN 61850 series
power utility automation -- Part 3: General
requirements
IEC 61968-1 -  Application integration at electric utilities - EN 61968-1 -
System interfaces for distribution
management -- Part 1: Interface architecture
and general requirements
IEC 61968-11 -  Application integration at electric utilities - EN 61968-11 -
System interfaces for distribution
management -- Part 11: Common
information model (CIM) extensions for
distribution
IEC 61968-100 2013 Application integration at electric utilities - EN 61968-100 2013
System interfaces for distribution
management -- Part 100: Implementation
profiles
IEC 61970-301 -  Energy management system application EN 61970-301 -
program interface (EMS-API) - Part 301:
Common information model (CIM) base
IEC 62056 series Electricity metering - Data exchange for EN 62056 series
meter reading, tariff and load control -- Part
47: COSEM transport layers for IPv4
networks
IEC 62325-301 -  Framework for energy market EN 62325-301 -
communications -- Part 301: Common
Information Model (CIM) extensions for
markets
IEC 62507-1 2010 Identification systems enabling EN 62507-1 2011
unambiguous information interchange -
Requirements -- Part 1: Principles and
methods

3

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IEC 62559-2

®


Edition 1.0 2015-04




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE
colour

inside










Use case methodology –

Part 2: Definition of the templates for use cases, actor list and requirements list




Méthodologie des cas d'utilisation –

Partie 2: Définition du formulaire type de modèle de cas d'utilisation, de la liste

d'acteurs et de la liste d'exigences















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 29.020 ISBN 978-2-8322-2656-8



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 2 – IEC 62559-2:2015 © IEC 2015
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviations . 8
4 Definition of a use case template . 12
4.1 Overview . 12
4.1.1 General . 12
4.1.2 Short template version and use case overview table . 13
4.1.3 Actor list and requirements list . 14
4.1.4 Use case repository . 14
4.2 Use case template . 14
5 Explanation of fields of the use case template . 17
6 Definition of an actor list . 29
7 Definition of a list for requirements . 30
Annex A (informative) Examples of actors . 34
Annex B (informative) Example of a use case based on the suggested template (short
and extended version) . 36
B.1 Short version of the use case "Locate and isolate fault and restore system
(FLISR Fault location, isolation, system restoration)" . 36
B.2 Use case overview table of the use case "Locate and isolate fault and restore
system (FLISR Fault location, isolation, system restoration)" . 41
B.3 Detailed version of the use case " Locate and isolate fault and restore system
(FLISR Fault location, isolation, system restauration)" . 41
Bibliography . 56

Figure 1 – IEC 62559 standard series . 5
Figure 2 – Overview of the use case template. 13

Table A.1 – Example of an actor list . 34

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IEC 62559-2:2015 © IEC 2015 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________

USE CASE METHODOLOGY –

Part 2: Definition of the templates for use cases,
actor list and requirements list

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62559-2 has been prepared by IEC technical committee 8: Systems
aspects for electrical energy supply.
This first edition cancels and replaces IEC PAS 62559:2008 which had been published together
with EPRI. Main content of the former PAS will be transferred to the new IEC 62559-4.
IEC 62559-1 to IEC 62559-3 are now more related to the application of the use case
methodology in standardisation. In this document, a revised and updated template is provided.

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– 4 – IEC 62559-2:2015 © IEC 2015
The text of this standard is based on the following documents:
FDIS Report on voting
8/1389/FDIS 8/1395/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 62559 series, published under the general title Use case
methodology, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until the
stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to
the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

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IEC 62559-2:2015 © IEC 2015 – 5 –
INTRODUCTION
For complex systems, the use case methodology supports a common understanding of
functionalities, actors and processes across different technical committees or even different
organizations. Developed as software engineering tool, the methodology can be used to
support the development of standards as it facilitates the analysis of requirements in relation to
new or existing standards. Further arguments for the use case methodology and background
information are available in IEC 62559-1.
Figure 1 provides an overview of the intended first parts of the IEC 62559, mainly describing
the relation between IEC 62559-2 and IEC 62559-3.
IEC 62559 − Use case methodology
Background: IEC 62559−1
Textual
use case
description
IEC 62559−2
Template
Word
UML use case
processing
IEC 62559−future
file / template
extension
UML profile definition
Web-
browser
2 possible routes
On-line Textual
editing Import / UML modelling tool
Export
XML
IEC 62559-3
Use case
repository
(Database)
Processes described in IEC 62559−1
IEC

Figure 1 – IEC 62559 standard series
IEC 62559-1 – Concept and processes in standardization
IEC 62559-1 is the basis for a common use case repository in order to gather use cases within
IEC on a common collaborative platform. This repository will also be used to organize a
harmonization of use cases in order to provide broadly accepted generic use cases as basis for
the further standardization work. It describes processes and provides basics for the use case
methodology like terms or use case types.
IEC 62559-2 – Definition of the templates for use cases, actor list and requirements list
IEC 62559-2 defines the structure of a use case template, an actor list and a list for
requirements. The document is mainly based on the previous IEC PAS 62559 specification and
shall be read together with IEC 62559-1.

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– 6 – IEC 62559-2:2015 © IEC 2015
IEC 62559-3 – Definition of use case template artefacts into an XML serialized format
Based on IEC 62559-2, IEC 62559-3 defines the required core concepts and their serialization
into an XML format of a use case template, an actor list and a list for detailed requirements.
The XML format is used to transfer the content of the template to other engineering systems
(e.g. UML modelling tools). These documents are developed using the energy system and
Smart Grids as examples, but they are general enough to be transferred to other domains and
systems. It is intended to develop a UML profile definition based on this part in the future.
Motivation
The International Standard IEC 62559 "Use case methodology" is needed to fulfill the SG3
decision 7 made by the SMB at its February 2010 meeting (SMB/4204/DL, Decision 137/10)
requesting the urgent delivery of a generic use case repository for all Smart Grid applications.
Nevertheless, the use case methodology described in this document is intended for a broader
application within standardization exceeding Smart Grid systems.
More and more complex systems such as Smart Grids or Smart Cities are raising the question
of managing system level requirements, which have to be fed by many domains of expertise (in
standardization related to different Technical Committees (TCs)), and which have to be broken
down further and shared by many TCs in charge of specifying standards to support these
system level functions.
One way to handle this transversality efficiently is to set some common methods and terms.
The use case methodology is the current state of art and supports further engineering
activities.
The use case methodology offers a unique way for sharing ideas and requirements of new use
cases or business cases between many experts/TC's with different backgrounds: e.g. domain
experts with knowledge about energy systems or business processes on one hand and system-
/IT-experts defining exchanged information and communication on the other hand. In the
requirement development process, domain experts are providing general ideas and functional
requirements. The main goal is for system experts to detail down these use cases to a level
they can be used to specify interfaces, dedicated functionality, data and service model
exchange. However, safety- or EMC-experts (as examples) may also make use of the
described use cases, their terminology and identified requirements.
However, the starting point is to set up a frame for consistency within IEC helping IEC
members to provide use cases in a consistent manner – this standard shall serve as basis for
use case repositories in order to gather, administrate, maintain, and evaluate use cases.
Within IEC, a use case repository shall be used as common collaborative platform for use case
elaboration and to organize a harmonization of use cases in order to provide broadly accepted
generic use cases as basis for further standardization work.
But the use case template defined in this document may serve not only for the development of
standards, but also – as it was the original purpose of the previous IEC PAS 62559:2008 (refer
to IEC 62559-4) – as a helpful means for the realization of projects within the area of complex
systems. Also other applications, which need the benefits of a structured requirements
development and formalized description of functionality, may make use of the suggested
template.
The use case methodology has to be seen as a process which starts with the definition of
business ideas, goals and requirements, detailing these in use case descriptions. This
information can be used as a basis to identify/link reference architectures describing the types
of components used, and going further down to an analysis for the further standardization
process.

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IEC 62559-2:2015 © IEC 2015 – 7 –
Further developments regarding the use case template are expected. These developments are
mainly related to information, which is required in the use case description for further analysis,
and which can be mapped to other information (e.g. to a reference architecture, IT security
methods, standards and data models). Partly this is considered in the suggested template of
this standard. Further relations will be described separately as they are still under development
and they might be considered for the further development of the IEC use case repository.

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– 8 – IEC 62559-2:2015 © IEC 2015
USE CASE METHODOLOGY –

Part 2: Definition of the templates for use cases,
actor list and requirements list



1 Scope
This part of IEC 62559 “Use case methodology” defines the structure of a use case template,
template lists for actors and requirements, as well as their relation to each other. In this
document, a standardized template for the description of use cases is defined for various
purposes like the use in standardization organizations for standards development or within
development projects for system development.
This document was developed for general application in various domains and systems. The
energy system/smart grid is used as example in this document as it was one of the first usage
areas for this use case template, but this general template can be applied in other usage areas
different from energy systems as well (e.g. smart home or electro-mobility).
The motivation, background information on use cases, recommendations for the handling of
use cases and the processes for the description of use cases inside standardization and in
relation to a central use case repository is described in IEC 62559-1.
2 Normative references
Void.
3 Terms, definitions and abbreviations
For the purposes of this document, the terms and definitions given in IEC 62559-1and the
following apply.
3.1
use case
specification of a set of actions performed by a system, which yields an observable result that
is, typically, of value for one or more actors or other stakeholders of the system
[SOURCE: ISO/IEC 19505-2:2012, 16.3.6]
3.2
actor
entity that communicates and interacts
Note 1 to entry: These actors can include people, software applications, systems, databases, and even the power
system itself.
[SOURCE: Based on IEC PAS 62559:2008]
3.3
role
role played by an actor in interaction with the system under discussion
Note 1 to entry: Alternative: A role represents the external intended behavior of a party. A party cannot share a
role.

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IEC 62559-2:2015 © IEC 2015 – 9 –
EXAMPLES A legally defined market participant (e.g. grid operator, customer), a generic role which represents a
bundle of possible roles (e.g. flexibility operator) or an artificially defined body needed for generic process and use
case descriptions.
Note 2 to entry: Legally or generically defined external actors may be named and identified by their roles.
[SOURCE: SG-CG/M490/E:2012-12, definition 3.17]
3.4
use case template
a form which allows the structured description of a use case in predefined fields
[SOURCE: SG-CG/M490/E:2012-12, definition 3.2]
3.5
repository
here used for a place where information like use cases can be stored, usually as a database
(refer to use case repository)
[SOURCE: based on SG-CG/M490/E:2012-12, definition 3.12]
3.6
use case repository
UCR
database, based on a given use case template, for editing, maintenance and administration of
use cases, actors and requirements including their interrelations
Note 1 to entry: The UCR is designed as collaborative platform for standardization bodies, inter alia equipped with
export functionalities as UML model or text template.
[SOURCE: based on SG-CG/M490/E:2012-12, definition 3.13]
3.7
system
set of interrelated elements considered in a defined context as a whole and separated from
their environment
Note 1 to entry: A system is generally defined with the view of achieving a given objective, for example by
performing a definite function.
[SOURCE: IEC 60050-351:2013, 351-42-08]
3.8
area
major usage area for use cases supporting of grouping, filtering and administration of use
cases within a common use cases database
EXAMPLE Energy Systems/Smart Grid, Smart Home.
Note 1 to entry: Might be used in combination with domain which further divides an area.
3.9
domain
area of knowledge or activity characterized by a set of concepts and terminology understood by
the practitioners in that area
EXAMPLE Taken from Smart Grid/energy system area: Generation, transmission, distribution, customer.
Note 1 to entry: Major area of similar technologies and organisational background, for the energy system some
domains are suggested in this document as examples thoughout this document.
[SOURCE: ISO/IEC 19501:2005: Unified Modeling Language Specification]

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– 10 – IEC 62559-2:2015 © IEC 2015
3.10
group/grouping
group of actors in order to organize an actor list
EXAMPLE Smart metering actors like meter operator (role), smart meter gateway (devices).
Note 1 to entry: Might be used in combination with domain and area.
3.11
zones
automation levels, classified in combination with a reference architecture
EXAMPLE SGAM.
3.12
smart grid architecture model
SGAM
suggested reference architecture for the smart grid area
[SOURCE: SG-CG/M490/C:2012-12]
3.13
semantic model
structured description of the semantics of a set of information, e.g. using some information
modeling language like UML
Note 1 to entry: Many different semantic models are expressions of the same semantics. Even with one language,
like UML, there are lots of ways to represent the structure of the same kind of information.
Note 2 to entry: Semantic modeling only represents information content – it does not include formatting/encoding
(syntactical) specifications. There are typically many formatting/encoding options for a given semantic model.
[SOURCE: based on SGAC Semantic Framework, draft version]
3.14
canonical data model
CDM
semantic model chosen as the single unifying model that will govern the semantic definition of
a collection of data specifications, such as the specifications for message payload content for a
collection of interfaces
[SOURCE: based on SGAC Semantic Framework, draft version]
3.15
namespace
(standardized) space of names qualifying pieces of information, including information about
their name detailed semantic, and usually their attached model (e.g. canonical data model)
3.16
name of information
unique ID which identifies the selected information to be exchanged in the context of the use
case and its step-by-step analysis and which should be related to the namespace
3.17
by-default namespace
namespace where “name of information” is by default originated from

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IEC 62559-2:2015 © IEC 2015 – 11 –
3.18
scenario
a possible sequence of interactions
[SOURCE: SG-CG/M490/E:2012-12, definition 3.10]
3.19
activity step
elementary step within a scenario representing the finest-grained description level of
interactions in the use case
[SOURCE: SG-CG/M490/E:2012-12, definition 3.11]
3.20
conceptual description
cluster of use cases which can be described in an overall description providing an introduction
and summarizing the main ideas and the relation
...