1、 IEC 60706-5Edition 2.0 2007-09INTERNATIONAL STANDARD NORME INTERNATIONALEMaintainability of equipment Part 5: Testability and diagnostic testing Maintenabilit de matriel Partie 5: Testabilit et tests pour diagnostic IEC60706-5:2007 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2007 IEC, Geneva,
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16、+41 22 919 03 00 IEC 60706-5Edition 2.0 2007-09INTERNATIONAL STANDARD NORME INTERNATIONALEMaintainability of equipment Part 5: Testability and diagnostic testing Maintenabilit de matriel Partie 5: Testabilit et tests pour diagnostic INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQ
17、UE INTERNATIONALE XBICS 03.120.01; 03.120.30; 21.020 PRICE CODECODE PRIXISBN 2-8318-9295-3 2 60706-5 IEC:2007 CONTENTS FOREWORD.5 INTRODUCTION.7 1 Scope.8 2 Normative references8 3 Terms, definitions and acronyms.8 3.1 Terms and definitions 8 3.2 Acronyms 13 4 Description of testability and diagnost
18、ic testing13 4.1 General .13 4.2 Objectives of testability15 4.3 Objectives of diagnostic testing16 4.4 Methods used for diagnostic testing .17 4.5 Methods used for condition monitoring.17 4.6 Concept of testability .17 5 Testability specification.18 5.1 General .18 5.2 Statement of work19 5.3 Speci
19、fication19 5.4 Characteristics of testability .23 5.4.1 Testability features 23 5.4.2 Operational context23 5.4.3 Test tasks23 5.5 Characteristic values for assessing testability 25 5.6 Criteria for evaluation of alternative diagnostic designs 25 6 Testability in the development process26 6.1 Genera
20、l .26 6.2 Functional assignment.27 6.3 Testability engineering.27 6.3.1 Design criteria for testability.27 6.3.2 Design for testability 28 6.3.3 Use of commercial off-the-shelf products (COTS).28 6.4 Testability development process 29 6.4.1 Logistic support .29 6.4.2 Availability and diagnostic test
21、ing.30 7 Assessment of testability 30 7.1 General .30 7.2 Verification by analysis 30 7.3 Verification by tests .30 8 Testability documentation .31 Annex A (informative) Calculation of characteristics of fault recognition and fault localization32 Annex B (informative) Development process for testabl
22、e products 38 60706-5 IEC:2007 3 Bibliography63 Figure 1 Testability and diagnostic testing during the life cycle15 Figure 2 Operational context 23 Figure 3 Development process in the V-model 26 Figure 4 Design levels and their logistic assignment, taking an aircraft as an example 29 Figure B.1 Exam
23、ple of how to determine the basic data 38 Figure B.2 Modelling of sub-functions and terminals .40 Figure B.3 Functional model showing the functional terminals between the sub-functions.40 Figure B.4 Functional model with inserted hardware units .42 Figure B.5 Functional model showing stimulation and
24、 measuring points 43 Figure B.6 Functional model showing test paths .44 Figure B.7 Portions of the test task.45 Figure B.8 Functional model showing the test paths of portion A .47 Figure B.9 Functional model showing the test paths of portions A + B + C + D 49 Figure B.10 Functional model of case stu
25、dy 1.51 Figure B.11 Functional model of case study 2.52 Figure B.12 Fault localization portions 54 Figure B.13 Functional model with additional stimulation and measuring points.56 Figure B.14 Selection criteria for verification.59 Figure B.15 Functional model shown in the form of an extended block d
26、iagram.61 Table 1 Elements of the operational concept 21 Table 2 Elements of the maintenance concept22 Table 3 Test task .24 Table 4 Example of logistic assignment 30 Table B.1 Data for the document “system specification“39 Table B.2 Data for the document “test specification“ (assignment of function
27、 to parameter)41 Table B.3 Database with hardware units and logistic assignment added42 Table B.4 Database expanded to include the test steps 43 Table B.5 Database expanded to include the test paths 44 Table B.6 Database expanded to include the test task portions.45 Table B.7 Determination of how ma
28、ny terminals and hardware units there are.46 Table B.8 Matrix showing coverage of terminals and paths .46 Table B.9 Determination of the characteristic value for the quality of the fault recognition (FR) during operation (section A).47 Table B.10 Determination of the characteristic value for the qua
29、lity of the fault recognition (FR) under test conditions (Portions A+B+C+D) .49 Table B.11 Coverage matrix .50 Table B.12 Coding of terminals.51 4 60706-5 IEC:2007 Table B.13 Sum field51 Table B.14 Fault localization matrix of case study 1 52 Table B.15 Fault localization matrix of case study 2 52 T
30、able B.16 Determining the characteristic value for the quality of fault localization (FL).53 Table B.17 Determination of the locatability of the hardware units .55 Table B.18 Data table expanded to include test path PP 5 56 Table B.19 Determination of the locatability of the hardware units, includin
31、g additional test path 5.57 Table B.20 Verification record 59 Table B.21 Example of the document “system specification“ .60 Table B.22 Example of the document “test specification“ 61 Table B.23 Verification record 62 60706-5 IEC:2007 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ MAINTAINABILITY OF E
32、QUIPMENT Part 5: Testability and diagnostic testing 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-operatio
33、n 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 “IE
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38、sparently 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 b
39、e 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 member
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41、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
42、 be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60706-5 has been prepared by IEC technical committee 56: Dependability. This second edition cancels and replaces the first edition published in 1994. This sec
43、ond edition constitutes a technical revision. It expands and provides more detail on the techniques and systems broadly outlined in the first edition. The text of this standard is based on the following documents: FDIS Report on voting 56/1211/FDIS 56/1231/RVD Full information on the voting for the
44、approval of this standard can be found in the report on voting indicated in the above table. 6 60706-5 IEC:2007 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all the parts in the IEC 60706 series, under the general title Maintainability of equipment,
45、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
46、reconfirmed; withdrawn; replaced by a revised edition, or amended. 60706-5 IEC:2007 7 INTRODUCTION Testability is an important feature in the operation and maintenance of a system or equipment and has a significant effect on its availability and maintainability. Diagnostic testing may be carried out
47、 manually or with test equipment which may contain various levels of automation. Optimum design for testability requires close cooperation between design, operation and maintenance organizations. This standard is intended to highlight the various aspects of testability and diagnostic testing and to
48、assist in their timely coordination. In this standard, items to be considered in respect of their testability design may be systems, equipment or functional units which are the objects of a contract, and will be referred to as “products“. Each product has to perform its required functions which shou
49、ld be verified during the development and production phases and should be retained over the whole life cycle. For a product to retain its functionality, the functional status of each sub-function should be known at any time while the product is in its operating condition. If a failure occurs, action should be taken to ensure that the fault is
