BS-EN-61078-1994 BS-5760-9-1992 IEC-61078-1991.pdf
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1、BRITISH STANDARD BS EN 61078:1994 BS 5760-9: 1992 IEC 1078:1991 Incorporating Amendment No. 1 Reliability of systems, equipment and components Part 9: Guide to the block diagram technique The European Standard EN 61078:1993 has the status of a British Standard UDC 621.3-192:658.562 Licensed Copy: sh
2、effieldun sheffieldun, na, Thu Nov 09 14:45:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5760-9:1992 This British Standard, having been prepared under the direction of the Quality, Management and Statistics Standards Policy Committee, was published under the authority of the Standards Board and
3、comes into effect on 15 October 1999 BSI 02-1999 The following BSI references relate to the work on this standard: Committee reference QMS/23 Special announcement in BSI News September 1991 ISBN 0 580 21224 6 Committees responsible for this British Standard The preparation of this British Standard w
4、as entrusted by the Quality, Management and Statistics Standards Policy Committee (QMS/-) to Technical Committee QMS/23, upon which the following bodies were represented: Association for Consumer Research (ACRE) Association of Consulting Engineers British Gas plc British Railways Board Cable and Wir
5、eless plc City University Civil Aviation Authority Cranfield Information Technology Institute Cranfield Institute of Technology Design Council EEA (the Association of Electronics, Telecommunications and Business Equipment Industries) Electricity Association Electronic Components Industry Federation
6、Engineering Equipment and Materials Users Association GAMBICA (BEAMA Ltd.) Institute of Petroleum Institute of Quality Assurance Institution of Electrical Engineers Institution of Plant Engineers Ministry of Defence National Computing Centre Ltd. Railway Industry Association of Great Britain Safety
7、and Reliability Society Society of British Aerospace Companies Limited Society of Motor Manufacturers and Traders Limited United Kingdom Atomic Energy Authority University of Technology, Loughborough Amendments issued since publication Amd. No.DateComments 8152April 1994Indicated by a sideline in th
8、e margin Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 14:45:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5760-9:1992 BSI 02-1999i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Introduction3 1Scope3 2Normative references3 3Definitions3 4Symbols3 5A
9、pplicability3 6System fault definitions and reliability requirements3 6.1General considerations3 6.2Detailed considerations4 7Elementary models4 7.1Developing the model4 7.2Evaluating the model7 8More complex models8 8.1General procedures8 8.2Models with common blocks12 8.3m out of n models (non-ide
10、ntical items)14 8.4Method of reduction15 9Extension of reliability block diagram methods to availability calculations16 9.1Introduction16 9.2Assumptions16 9.3Examples16 9.4Conclusions and general remarks16 Annex A (normative) Symbols and abbreviations18 Annex B (informative) Summary of formulae20 An
11、nex ZA (normative) Other international publications quoted in this standard with the references of the relevant European publications22 Figure 15 Figure 25 Figure 35 Figure 45 Figure 55 Figure 66 Figure 76 Figure 86 Figure 97 Figure 108 Figure 119 Figure 129 Figure 1310 Figure 1412 Figure 1512 Figur
12、e 1614 Figure 1715 Figure 18a15 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 14:45:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5760-9:1992 ii BSI 02-1999 Page Figure 18b15 Figure 1917 Table 111 Table 211 Table 313 List of referencesInside back cover Licensed Copy: sheffieldun sheffiel
13、dun, na, Thu Nov 09 14:45:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5760-9:1992 BSI 02-1999 iii National foreword This Part of BS 5760 has been prepared under the direction of the Quality, Management and Statistics Standards Policy Committee. It is identical with IEC 1078:1991 Analysis techni
14、ques for dependability Reliability block diagram method, published by the International Electrotechnical Commission (IEC). In 1993 the European Committee for Electrotechnical Standardization (CENELEC) accepted IEC 1078:1991 as European Standard EN 61078:1993. As a consequence of implementing the Eur
15、opean Standard this British Standard is renumbered as BS EN 61078 and any reference to BS 5760-9 should be read as a reference to BS EN 61078. Nine Parts of this standard have been published and these may be summarized as follows: Part 0: Introductory guide to reliability. This Part provides guidanc
16、e to directors of companies who need to know why reliability is important to them, to engineers not trained in quality and reliability to show how reliability should influence their technical decision making, and to middle management not specialized in engineering, to explain how measures to achieve
17、 reliability should be integrated with other aspects of project management to give optimum results. Part 1: Guide to reliability and maintainability programme management. This Part discusses the essential features of a comprehensive reliability and maintainability programme for the planning, organiz
18、ation, direction and control of resources to produce systems, equipment and components which will be reliable and maintainable. It includes consideration of the specification and assessment of reliability and maintainability and of arrangements for the collection of reliability data. Part 2: Guide t
19、o the assessment of reliability. This Part recommends general procedures for the assessment of reliability of hardware systems and contains guidance for the reliability practitioner on the quantitative and statistical aspects of reliability, such as reliability modelling, the provision of data, and
20、the concepts of redundancy and simulation. Part 3: Guide to reliability practices: examples. This part contains authentic practical examples illustrating the principles established in Part 1 and Part 2 of BS 5760. Part 4: Guide to specification clauses relating to the achievement and development of
21、reliability in new and existing items. This Part provides more detailed guidance on the specification of reliability. Part 5: Guide to failure modes, effects and criticality analysis (FMEA and FMECA). This Part describes failure modes and effects analysis (FMEA) and failure modes, effects and critic
22、ality analysis (FMECA), and gives guidance on the application of these techniques. Part 6: Guide to programmes for reliability growth. This Part describes procedures to expose and remove weaknesses in hardware and software items in order to achieve acceptable reliability in a product. It explains ba
23、sic concepts, management and test procedures and describes techniques for analysis and correction of failures. Part 7: Guide to fault tree analysis. This Part describes fault tree analysis and gives guidance on the application of this technique which may be used to identify factors affecting the rel
24、iability, performance and safety characteristics of a system. Part 9: Guide to the block diagram technique. This Part describes the use of the block diagram technique for modelling and evaluating the reliability of both elementary and more complex systems. The extension of the method to calculate av
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