1、 IEC 60300-3-4Edition 2.0 2007-09INTERNATIONAL STANDARD NORME INTERNATIONALEDependability management Part 3-4: Application guide Guide to the specification of dependability requirements Gestion de la sret de fonctionnement Partie 3-4: Guide dapplication Spcification dexigences de sret de fonctionnem
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16、le FAQ du Service clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 60300-3-4Edition 2.0 2007-09INTERNATIONAL STANDARD NORME INTERNATIONALEDependability management Part 3-4: Application guide Guide to the specification of dependability requirements Gestion d
17、e la sret de fonctionnement Partie 3-4: Guide dapplication Spcification dexigences de sret de fonctionnement INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE WICS 03.100.40; 03.120.01 PRICE CODECODE PRIXISBN 2-8318-9308-9 2 60300-3-4 IEC:2007 CONTENTS FOREWORD.4 I
18、NTRODUCTION.6 1 Scope.7 2 Normative references .7 3 Terms and definitions .9 4 General considerations for dependability specifications9 4.1 The need for dependability 9 4.2 Requirements and goals11 4.3 Systems 11 4.4 Demonstration of achievement of requirements .13 4.4.1 Concept.13 4.4.2 Activities1
19、4 4.5 Contracting for dependability.15 4.6 Types of specification16 4.7 Derivation of dependability specifications 17 5 Dependability management 18 6 Availability19 6.1 General .19 6.1.1 Choice of dependability characteristic19 6.1.2 Relationship between availability, reliability and maintainability
20、 .19 6.2 Availability specifications.20 6.2.1 Quantitative requirements20 6.2.2 Qualitative requirements20 6.3 Provision of availability verification and validation .20 6.3.1 General .20 6.3.2 Verification and validation by testing21 6.3.3 Verification and validation by analysis .21 7 Reliability .2
21、1 7.1 General .21 7.2 Reliability specification22 7.2.1 Quantitative requirements22 7.2.2 Qualitative requirements23 7.3 Reliability verification and validation24 7.3.1 General .24 7.3.2 Verification and validation by testing24 7.3.3 Verification and validation by analysis .25 8 Maintainability 25 8
22、.1 General .25 8.2 Maintainability specification.25 8.2.1 Quantitative requirements25 8.2.2 Qualitative requirements26 8.3 Maintainability verification and validation.26 9 Maintenance support 27 9.1 General .27 9.2 Maintenance support specification.27 60300-3-4 IEC:2007 3 9.2.1 Quantitative requirem
23、ents27 9.2.2 Qualitative requirements28 9.3 Maintenance support verification and validation 28 Annex A (informative) Reference standards for verification and validation techniques29 Annex B (informative) Examples of reliability, maintainability, maintenance support and availability requirements 31 B
24、ibliography33 Figure 1 Relationship between cost and reliability10 Figure 2 System elements12 Table A.1 Techniques for dependability verification and validation through testing.29 Table A.2 Techniques for dependability verification and validation through analysis.30 4 60300-3-4 IEC:2007 INTERNATIONA
25、L 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 commi
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35、ttention 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: Dependabi
36、lity. 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 physic
37、al 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 su
38、pport has been updated and expanded to similar level of detail to reliability. 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 repor
39、t 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
40、 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. 6 60300-3-4
41、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
42、 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
43、 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
44、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
45、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 standa
46、rd 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
47、 62347 is to identify system requirements by functions from a system engineering perspective. It provides a process for transforming the purchasers view on system applications into a technical view for engineering the system. IEC 62347 emphasises architectural and functional design for realisation o
48、f functions with appropriate selection of hardware, software and human elements to achieve the system dependability requirements relevant to the purchasers needs. 60300-3-4 IEC:2007 7 DEPENDABILITY MANAGEMENT Part 3-4: Application guide Guide to the specification of dependability requirements 1 Scop
49、e 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 p
