SIST EN 60300-3-4:2008

SLOVENSKI STANDARD
SIST EN 60300-3-4:2008
01-marec-2008
Upravljanje zagotovljivosti - 3-4. del: Vodilo za uporabo - Vodilo za specifikacijo
zahtev za zagotovljivost (IEC 60300-3-4:2007)
Dependability management -- Part 3-4: Application guide - Guide to the specification of
dependability requirements
Zuverlässigkeitsmanagement -- Teil 3-4: Anwendungsleitfaden - Anleitung zum
Festlegen von Zuverlässigkeitsforderungen
Gestion de la sûreté de fonctionnement -- Partie 3-4: Guide d'application - Spécification
d'exigences de sûreté de fonctionnement
Ta slovenski standard je istoveten z: EN 60300-3-4:2008
ICS:
03.120.01 Kakovost na splošno Quality in general
21.020 =QDþLOQRVWLLQQDþUWRYDQMH Characteristics and design of
VWURMHYDSDUDWRYRSUHPH machines, apparatus,
equipment
SIST EN 60300-3-4:2008 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN 60300-3-4:2008

---------------------- Page: 2 ----------------------

SIST EN 60300-3-4:2008


EUROPEAN STANDARD
EN 60300-3-4

NORME EUROPÉENNE
January 2008
EUROPÄISCHE NORM

ICS 03.100.40; 03.120.01


English version


Dependability management -
Part 3-4: Application guide -
Guide to the specification of dependability requirements
(IEC 60300-3-4:2007)


Gestion de la sûreté de fonctionnement -  Zuverlässigkeitsmanagement -
Partie 3-4: Guide d'application - Teil 3-4: Anwendungsleitfaden -
Spécification d'exigences de sûreté Anleitung zum Festlegen von
de fonctionnement Zuverlässigkeitsforderungen
(CEI 60300-3-4:2007) (IEC 60300-3-4:2007)




This European Standard was approved by CENELEC on 2007-12-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels


© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60300-3-4:2008 E

---------------------- Page: 3 ----------------------

SIST EN 60300-3-4:2008
EN 60300-3-4:2008 – 2 –
Foreword
The text of document 56/1212/FDIS, future edition 2 of IEC 60300-3-4, prepared by IEC TC 56,
Dependability, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
EN 60300-3-4 on 2007-12-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2008-09-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-12-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60300-3-4:2007 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 60812 NOTE Harmonized as EN 60812:2006 (not modified).
IEC 61165 NOTE Harmonized as EN 61165:2006 (not modified).
IEC 61508-1 NOTE Harmonized as EN 61508-1:2001 (not modified).
Harmonized as EN 61508-2:2001 (not modified).
IEC 61508-2 NOTE
Harmonized as EN 61508-3:2001 (not modified).
IEC 61508-3 NOTE
IEC 61508-4 NOTE Harmonized as EN 61508-4:2001 (not modified).
IEC 61508-5 NOTE Harmonized as EN 61508-5:2001 (not modified).
IEC 61508-6 NOTE Harmonized as EN 61508-6:2001 (not modified).
IEC 61508-7 NOTE Harmonized as EN 61508-7:2001 (not modified).
Harmonized as EN 61709:1998 (not modified).
IEC 61709 NOTE
__________

---------------------- Page: 4 ----------------------

SIST EN 60300-3-4:2008
– 3 – EN 60300-3-4:2008

Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.

Publication Year Title EN/HD Year
1)
IEC 60050-191 – International Electrotechnical Vocabulary – –
(IEV) -
Chapter 191: Dependability and quality of
service


1) 2)
IEC 60300-1 – Dependability management - EN 60300-1 2003
Part 1: Dependability management systems


1) 2)
IEC 60300-2 – Dependability management - EN 60300-2 2004
Part 2: Guidelines for dependability
management


1) 2)
IEC 60300-3-1 – Dependability management - EN 60300-3-1 2004
Part 3-1: Application guide - Analysis
techniques for dependability - Guide on
methodology


1) 2)
IEC 60300-3-2 – Dependability management - EN 60300-3-2 2005
Part 3-2: Application guide - Collection of
dependability data from the field


1) 2)
IEC 60300-3-3 – Dependability management - EN 60300-3-3 2004
Part 3-3: Application guide - Life cycle costing


1)
IEC 60300-3-5 – Dependability management - – –
Part 3-5: Application guide - Reliability test
conditions and statistical test principles


1)
IEC 60300-3-10 – Dependability management - – –
Part 3-10: Application guide - Maintainability


1) 2)
IEC 60300-3-12 – Dependability management - EN 60300-3-12 2004
Part 3-12: Application guide - Integrated
logistic support


1) 2)
IEC 60300-3-14 – Dependability management - EN 60300-3-14 2004
Part 3-14: Application guide - Maintenance
and maintenance support



1)
Undated reference.
2)
Valid edition at date of issue.

---------------------- Page: 5 ----------------------

SIST EN 60300-3-4:2008
EN 60300-3-4:2008 – 4 –
Publication Year Title EN/HD Year
1)
IEC 60605-4 – Equipment reliability testing - – –
Part 4: Statistical procedures for exponential
distribution - Point estimates, confidence
intervals, prediction intervals and tolerance
intervals


1)
IEC 60605-6 – Equipment reliability testing - – –
Part 6: Tests for the validity and estimation of
the constant failure rate and constant failure
intensity


1) 2)
IEC 60706-2 – Maintainability of equipment - EN 60706-2 2006
Part 2: Maintainability requirements and
studies during the design and development
phase


1) 2)
IEC 60706-3 – Maintainability of equipment - EN 60706-3 2006
Part 3: Verification and collection, analysis
and presentation of data


1) 2)
IEC 60706-5 – Maintainability of equipment - EN 60706-5 2007
Part 5: Testability and diagnostic testing


1) 2)
IEC 61014 – Programmes for reliability growth EN 61014 2003


1) 2)
IEC 61025 – Fault Tree Analysis (FTA) EN 61025 2007


1)
IEC 61070 – Compliance test procedures for steady-state – –
availability


1) 2)
IEC 61078 – Analysis techniques for dependability - EN 61078 2006
Reliability block diagram and Boolean
methods


1)
IEC 61123 – Reliability testing - Compliance test plans for – –
success ratio


1) 2)
IEC 61124 – Reliability testing - Compliance tests for EN 61124 2006
constant failure rate and constant failure
intensity


1) 2)
IEC 61160 – Design review EN 61160 2005


1) 2)
IEC 61164 – Reliability growth - Statistical test and EN 61164 2004
estimation methods


IEC 61508 Series Functional safety of EN 61508 Series
electrical/electronic/programmable electronic
safety-related systems


1)
IEC 61649 – Goodness-of-fit tests, confidence intervals – –
and lower confidence limits for Weibull
distributed data


1) 2)
IEC 61703 – Mathematical expressions for reliability, EN 61703 2002
availability, maintainability and maintenance
support terms


1)
IEC 61710 – Power law model - Goodness-of-fit tests and – –
estimation methods


1)
IEC 61713 – Software dependability through the software – –
life-cycle processes - Application guide

---------------------- Page: 6 ----------------------

SIST EN 60300-3-4:2008
– 5 – EN 60300-3-4:2008
Publication Year Title EN/HD Year
1)
IEC 62198 – Project risk management - Application – –
guidelines


1) 2)
IEC 62308 – Equipment reliability - Reliability assessment EN 62308 2006
methods


1) 2)
IEC 62347 – Guidance on system dependability EN 62347 2007
specifications

---------------------- Page: 7 ----------------------

SIST EN 60300-3-4:2008

---------------------- Page: 8 ----------------------

SIST EN 60300-3-4:2008
IEC 60300-3-4
Edition 2.0 2007-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Dependability management –
Part 3-4: Application guide – Guide to the specification of dependability
requirements

Gestion de la sûreté de fonctionnement –
Partie 3-4: Guide d'application – Spécification d'exigences de sûreté de
fonctionnement

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
W
CODE PRIX
ICS 03.100.40; 03.120.01 ISBN 2-8318-9308-9

---------------------- Page: 9 ----------------------

SIST EN 60300-3-4:2008
– 2 – 60300-3-4 © IEC:2007
CONTENTS
FOREWORD.4
INTRODUCTION.6

1 Scope.7
2 Normative references .7
3 Terms and definitions .9
4 General considerations for dependability specifications .9
4.1 The need for dependability .9
4.2 Requirements and goals.11
4.3 Systems .11
4.4 Demonstration of achievement of requirements .13
4.4.1 Concept.13
4.4.2 Activities.14
4.5 Contracting for dependability.15
4.6 Types of specification.16
4.7 Derivation of dependability specifications .17
5 Dependability management .18
6 Availability.19
6.1 General .19
6.1.1 Choice of dependability characteristic.19
6.1.2 Relationship between availability, reliability and maintainability .19
6.2 Availability specifications.20
6.2.1 Quantitative requirements.20
6.2.2 Qualitative requirements.20
6.3 Provision of availability verification and validation .20
6.3.1 General .20
6.3.2 Verification and validation by testing.21
6.3.3 Verification and validation by analysis .21
7 Reliability .21
7.1 General .21
7.2 Reliability specification.22
7.2.1 Quantitative requirements.22
7.2.2 Qualitative requirements.23
7.3 Reliability verification and validation.24
7.3.1 General .24
7.3.2 Verification and validation by testing.24
7.3.3 Verification and validation by analysis .25
8 Maintainability .25
8.1 General .25
8.2 Maintainability specification.25
8.2.1 Quantitative requirements.25
8.2.2 Qualitative requirements.26
8.3 Maintainability verification and validation.26
9 Maintenance support .27
9.1 General .27
9.2 Maintenance support specification.27

---------------------- Page: 10 ----------------------

SIST EN 60300-3-4:2008
60300-3-4 © IEC:2007 – 3 –
9.2.1 Quantitative requirements.27
9.2.2 Qualitative requirements.28
9.3 Maintenance support verification and validation .28

Annex A (informative) Reference standards for verification and validation techniques.29
Annex B (informative) Examples of reliability, maintainability, maintenance support
and availability requirements .31

Bibliography.33

Figure 1 – Relationship between cost and reliability.10
Figure 2 – System elements.12

Table A.1 – Techniques for dependability verification and validation through testing.29
Table A.2 – Techniques for dependability verification and validation through analysis.30

---------------------- Page: 11 ----------------------

SIST EN 60300-3-4:2008
– 4 – 60300-3-4 © IEC:2007
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________

DEPENDABILITY MANAGEMENT –

Part 3-4: Application guide –
Guide to the specification of dependability requirements


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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 60300-3-4 has been prepared by IEC technical committee 56:
Dependability.
This second edition cancels and replaces the first edition published in 1996 and constitutes a
technical revision.
The main changes from the previous edition are as follows:
– the concept of systems has been included and the need to specify the dependability of the
system and not just the physical equipment has been stressed;
– the need for verification and validation of the requirement has been included;
– differentiation has been made between requirements, that can be measured and verified
and validated, and goals, which cannot;
– the content on availability, maintainability and maintenance support has been updated and
expanded to similar level of detail to reliability.

---------------------- Page: 12 ----------------------

SIST EN 60300-3-4:2008
60300-3-4 © IEC:2007 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
56/1212/FDIS 56/1233/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 of the IEC 60300 series, under the general title Dependability management
can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result 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.

---------------------- Page: 13 ----------------------

SIST EN 60300-3-4:2008
– 6 – 60300-3-4 © IEC:2007
INTRODUCTION
In many systems, reliability, maintainability and availability are essential performance
characteristics. These characteristics, together with maintenance support performance, are
known collectively as dependability.
In systems where any of the dependability characteristics are important, it is necessary that
these characteristics should be defined and specified in the same way as other system
characteristics such as technical performance, dimensions and mass.
The levels of reliability, maintainability, availability and maintenance support performance
achieved by a system depend on the conditions under which the system is used and also on
the mission profile of the system. When requirements for dependability characteristics are
specified, it is necessary to define the conditions of storage, transportation, installation and
use that will be applied to the system. It may be important to take account not only of the
conditions under which the system will operate, but also of the maintenance policy and
organization for maintenance support of the system.
In order to assess the values of the dependability characteristics achieved, it is necessary to
use statistical methods.
Dependability characteristics may be specified, like other performance characteristics, in
three different ways:
1) specifications written by the supplier;
2) specifications written by the purchaser;
3) specifications mutually agreed or written by the supplier and the purchaser.
This standard is applicable to all three types of specification.
This standard complements IEC 62347 which deals with the definitions of systems and their
constituent elements and how to define these so that the dependability requirements of each
element can be specified using this standard. The premise of IEC 62347 is to identify system
requirements by functions from a system engineering perspective. It provides a process for
transforming the purchaser’s view on system applications into a technical view for engineering
the system. IEC 62347 emphasises architectural and functional design for realisation of
functions with appropriate selection of hardware, software and human elements to achieve the
system dependability requirements relevant to the purchaser’s needs.

---------------------- Page: 14 ----------------------

SIST EN 60300-3-4:2008
60300-3-4 © IEC:2007 – 7 –
DEPENDABILITY MANAGEMENT –

Part 3-4: Application guide –
Guide to the specification of dependability requirements



1 Scope
This part of IEC 60300 gives guidance on specifying the required dependability characteristics
in specifications, together with specifications of procedures and criteria for verification and
validation.
The guidance provided includes the following:
– advice on specifying quantitative and qualitative reliability, maintainability, availability and
maintenance support requirements;
– advice to purchasers of a system on how to ensure that the specified requirements will be
fulfilled by suppliers;
– advice to suppliers to help them to meet purchaser requirements.
Other documents, such as legislation and governmental regulation may also place
requirements on systems and these should be applied in addition to any specifications
derived in accordance with this standard.
NOTE 1 Whilst mainly addressing system and equipment level reliability, many of the techniques described in the
different parts of IEC 60300 may also be applied to products, items or at the component level. The term system is
used throughout this standard.
NOTE 2 This standard does not give guidance on the management of dependability programmes or on the various
activities necessary to fulfil stated availability, reliability, maintainability and maintenance support requirements.
For this general guidance, see other standards.
NOTE 3 Safety and environment specifications are not directly considered in this guide. However, much of the
guidance in this standard could also be applied to safety or environmental specification.
NOTE 4 Specifications for the dependability of a service are not considered in this guide. This includes the
provision of a service such as those provided through Public-Private Partnership procurements.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the reference cited applies. For undated references, the latest
edition of the referenced document (including any amendments) applies.
IEC 60050-191, International Electrotechnical Vocabulary (IEV) – Chapter 191: Dependability
and quality of service.
IEC 60300-1, Dependability management systems – Part 1: Dependability management
systems
IEC 60300-2, Dependability management – Part 2: Guidelines for dependability management
IEC 60300-3-1, Dependability management – Part 3-1: Application guide – Analysis
techniques for dependability – Guide on methodology
IEC 60300-3-2, Dependability management – Part 3-2: Application guide – Collection of
dependability data from the field

---------------------- Page: 15 ----------------------

SIST EN 60300-3-4:2008
– 8 – 60300-3-4 © IEC:2007
IEC 60300-3-3, Dependability management – Part 3-3: Application guide – Life cycle costing
IEC 60300-3-5, Dependability management – Part 3-5: Application guide – Reliability test
conditions and statistical test principles
IEC 60300-3-10, Dependability management – Part 3-10: Application guide – Maintainability
IEC 60300-3-12, Dependability management – Part 3-12: Application guide – Integrated
logistic support
IEC 60300-3-14, Dependability management – Part 3-14: Application guide – Maintenance
and maintenance support
IEC 60605-4, Equipment reliability testing – Part 4: Statistical procedures for exponential
distribution – Point estimates, confidence intervals, prediction intervals and tolerance intervals
IEC 60605-6, Equipment reliability testing – Part 6: Tests for the validity and estimation of the
constant failure rate and constant failure intensity
IEC 60706-2, Maintainability of equipment – Part 2: Maintainability requirements and studies
during the design and development phase
IEC 60706-3, Maintainability of equipment – Part 3: Verification and collection, analysis and
presentation of data
IEC 60706-5, Maintainability of equipment – Part 5: Diagnostic testing
IEC 61014, Programmes for reliability growth
IEC 61025, Fault tree analysis (FTA)
IEC 61070, Compliance test procedures for steady-state availability
IEC 61078, Analysis techniques for dependability – Reliability block diagram and boolean
methods
IEC 61123, Reliability testing – Compliance test plans for success ratio
IEC 61124, Reliability testing – Compliance tests for constant failure rate and constant failure
intensity
IEC 61160, Design review
IEC 61164, Reliability growth – Statistical test and estimation methods
IEC 61508 (all parts), Functional safety of electrical/electronic/programmable electronic
safety-related systems
IEC 61649, Goodness-of-fit tests, confidence intervals and lower confidence limits for Weibull
distributed data
IEC 61703, Mathematical expressions for reliability, availability, maintainability and
maintenance support terms
IEC 61710, Power law model – Goodness-of-fit tests and estimation methods

---------------------- Page: 16 ----------------------

SIST EN 60300-3-4:2008
60300-3-4 © IEC:2007 – 9 –
IEC 61713, Software dependability through the software life cycle processes – Application
guide
IEC 62198, Project risk management – Application guidelines
IEC 62308, Equipment Reliability – Reliabilit
...