1、Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/04/2008 03:05, Uncontrolled Copy, (c) BSIg49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58t
2、estingICS 03.120.01; 03.120.30; 21.020; 29.020Maintainability of equipment Part 5: Testability and diagnostic BRITISH STANDARDBS EN 60706-5:2007BS EN 60706-5:2007Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/04/2008 03:05, Uncontrolled Copy, (c) BSIThis British Standard was published und
3、er the authority of the Standards Policy and Strategy Committee on 31 January 2008 BSI 2008ISBN 978 0 580 54763 8Amendments/corrigenda issued since publicationDate Commentsrequest to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are resp
4、onsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.National forewordThis British Standard is the UK implementation of EN 60706-5:2007. It is identical to IEC 60706-5:2007. It supersedes BS 6548-5:1995 which is withdrawn. The UK partic
5、ipation in its preparation was entrusted by Technical Committee DS/1, Dependability and terotechnology, to Subcommittee DS/1/1, Dependability.A list of organizations represented on this committee can be obtained on EUROPEAN STANDARD EN 60706-5 NORME EUROPENNE EUROPISCHE NORM October 2007 CENELEC Eur
6、opean Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide f
7、or CENELEC members. Ref. No. EN 60706-5:2007 E ICS 03.120.01; 03.120.30; 21.020 English version Maintainability of equipment - Part 5: Testability and diagnostic testing (IEC 60706-5:2007) Maintenabilit de matriel - Partie 5: Testabilit et tests pour diagnostic (CEI 60706-5:2007) Instandhaltbarkeit
8、von Gerten - Teil 5: Prfbarkeit und diagnostisches Prfen (IEC 60706-5:2007) This European Standard was approved by CENELEC on 2007-10-01. 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 nat
9、ional 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
10、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 C
11、zech 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. Licensed Copy: Wang Bin, ISO/EXCHANGE
12、CHINA STANDARDS, 29/04/2008 03:05, Uncontrolled Copy, (c) BSIForeword The text of document 56/1211/FDIS, future edition 2 of IEC 60706-5, prepared by IEC TC 56, Dependability, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60706-5 on 2007-10-01. The following dates
13、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) 2008-07-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2010-10-01 Annex ZA has been added by CEN
14、ELEC. _ Endorsement notice The text of the International Standard IEC 60706-5:2007 was approved by CENELEC as a European Standard without any modification. _ EN 60706-5:2007 2 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/04/2008 03:05, Uncontrolled Copy, (c) BSICONTENTS INTRODUCTION.6 1
15、 Scope.7 2 Normative references7 3 Terms, definitions and acronyms.7 3.1 Terms and definitions 7 3.2 Acronyms 12 4 Description of testability and diagnostic testing12 4.1 General .12 4.2 Objectives of testability14 4.3 Objectives of diagnostic testing15 4.4 Methods used for diagnostic testing .16 4.
16、5 Methods used for condition monitoring.16 4.6 Concept of testability .16 5 Testability specification.17 5.1 General .17 5.2 Statement of work18 5.3 Specification18 5.4 Characteristics of testability .22 5.4.1 Testability features 22 5.4.2 Operational context225.4.3 Test tasks22 5.5 Characteristic v
17、alues for assessing testability 24 5.6 Criteria for evaluation of alternative diagnostic designs 24 6 Testability in the development process25 6.1 General .25 6.2 Functional assignment.26 6.3 Testability engineering.26 6.3.1 Design criteria for testability.26 6.3.2 Design for testability 27 6.3.3 Us
18、e of commercial off-the-shelf products (COTS).27 6.4 Testability development process 28 6.4.1 Logistic support .28 6.4.2 Availability and diagnostic testing.29 7 Assessment of testability 29 7.1 General .29 7.2 Verification by analysis 29 7.3 Verification by tests .29 8 Testability documentation .30
19、 Annex A (informative) Calculation of characteristics of fault recognition and fault localization31 Annex B (informative) Development process for testable products 37 Annex ZA (normative) Normative references to international publications with their corresponding European publications 63 EN 60706-5:
20、2007 3 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/04/2008 03:05, Uncontrolled Copy, (c) BSIBibliography62 Figure 1 Testability and diagnostic testing during the life cycle13 Figure 2 Operational context 22 Figure 3 Development process in the V-model 25 Figure 4 Design levels and their
21、 logistic assignment, taking an aircraft as an example 28 Figure B.1 Example of how to determine the basic data 37 Figure B.2 Modelling of sub-functions and terminals .39 Figure B.3 Functional model showing the functional terminals between the sub-functions.39 Figure B.4 Functional model with insert
22、ed hardware units .41 Figure B.5 Functional model showing stimulation and measuring points 42 Figure B.6 Functional model showing test paths .43 Figure B.7 Portions of the test task.44 Figure B.8 Functional model showing the test paths of portion A .46 Figure B.9 Functional model showing the test pa
23、ths of portions A + B + C + D 48 Figure B.10 Functional model of case study 1.50 Figure B.11 Functional model of case study 2.51 Figure B.12 Fault localization portions 53 Figure B.13 Functional model with additional stimulation and measuring points.55 Figure B.14 Selection criteria for verification
24、.58 Figure B.15 Functional model shown in the form of an extended block diagram.60 Table 1 Elements of the operational concept 20 Table 2 Elements of the maintenance concept21 Table 3 Test task .23 Table 4 Example of logistic assignment 29 Table B.1 Data for the document “system specification“38 Tab
25、le B.2 Data for the document “test specification“ (assignment of function to parameter)40 Table B.3 Database with hardware units and logistic assignment added41 Table B.4 Database expanded to include the test steps 42 Table B.5 Database expanded to include the test paths 43 Table B.6 Database expand
26、ed to include the test task portions.44 Table B.7 Determination of how many terminals and hardware units there are.45 Table B.8 Matrix showing coverage of terminals and paths .45 Table B.9 Determination of the characteristic value for the quality of the fault recognition (FR) during operation (secti
27、on A).46 Table B.10 Determination of the characteristic value for the quality of the fault recognition (FR) under test conditions (Portions A+B+C+D) .48 Table B.11 Coverage matrix .49 Table B.12 Coding of terminals.50 EN 60706-5:2007 4 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/04/200
28、8 03:05, Uncontrolled Copy, (c) BSITable B.13 Sum field50Table B.14 Fault localization matrix of case study 1 51 Table B.15 Fault localization matrix of case study 2 51 Table B.16 Determining the characteristic value for the quality of fault localization (FL).52 Table B.17 Determination of the locat
29、ability of the hardware units .54 Table B.18 Data table expanded to include test path PP 5 55 Table B.19 Determination of the locatability of the hardware units, including additional test path 5.56Table B.20 Verification record 58 Table B.21 Example of the document “system specification“ .59 Table B
30、.22 Example of the document “test specification“ 60 Table B.23 Verification record 61 EN 60706-5:2007 5 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/04/2008 03:05, Uncontrolled Copy, (c) BSIINTRODUCTION Testability is an important feature in the operation and maintenance of a system or
31、equipment and has a significant effect on its availability and maintainability. Diagnostic testing may be carried out manually or with test equipment which may contain various levels of automation. Optimum design for testability requires close cooperation between design, operation and maintenance or
32、ganizations. This standard is intended to highlight the various aspects of testability and diagnostic testing and to 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 object
33、s of a contract, and will be referred to as “products“. Each product has to perform its required functions which should 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
34、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 recognized and the faulty item localized. This requirement placed on the testability of a product might appear to be quite simple, but if
35、it is not considered at the start of product development, subsequent realization will result in increased work and significantly increased cost. If all requirements are available at the start of development, the development engineer can specify the functional characteristic “testability“ without muc
36、h additional effort and therefore achieve considerable cost savings e.g. by minimizing the number of test steps for verifying the development results. Experience has shown that the extra cost and effort in the development phase can be recovered for example in the production phase since available tes
37、t equipment can be used. Reliable fault recognition and low in-service maintenance costs increase the market value of a testable product considerably. As the technologies which are applied in the products covered by this standard are wide-ranging, this document has been written in a neutral manner w
38、ith regard to technologies and techniques. This standard therefore only provides an assessment basis for making calculations and the basic approach for achieving the required testability of a product. The technical realization of fault recognition and fault localization in the product is the task of
39、 the product development engineer and has to be achieved according to the state of the art at the time when the product is being developed. It is therefore not of great importance whether the required test task is realized in hardware or software form, but it is essential that all functions are chec
40、ked via test paths and that the characteristic values established for testability correspond to the specified target values. If there are deviations from the target values, action should be taken to ensure that the target values are met. These actions should take place at an early stage of developme
41、nt before freezing the design. EN 60706-5:2007 6 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/04/2008 03:05, Uncontrolled Copy, (c) BSIMAINTAINABILITY OF EQUIPMENT Part 5: Testability and diagnostic testing 1 Scope The purpose of this part of IEC 60706 is to provide guidance for the ear
42、ly consideration of testability aspects in design and development; assist in determining effective test procedures as an integral part of operation and maintenance. This International Standard can be applied to all types of products which may include commercial off-the-shelf (COTS) items. In this re
43、spect, it does not matter whether the product belongs to mechanical, hydraulic, electrical or some other technology. In addition, this International Standard applies to the development of any products, with the aim of designing the product characteristics so that they are verifiable (testable). The
44、objective of this International standard is to ensure that prerequisites relating to the testability of products are defined in the preliminary phases of development, laid down by the customer, implemented, documented and verified during development. This International Standard also provides methods
45、 to implement and assess testability as an integral part of the product design. It recommends that the product testability documentation should be continually updated over the products life cycle. 2 Normative references The following documents are indispensable for the application of this document.
46、For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050-191, International Electrotechnical Vocabulary Chapter 191: Dependability and quality of service IEC 60706-2, Maintainability of e
47、quipment 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 60300-3-10, Dependability management Part 3-10: Application guide Maintainability 3 T
48、erms, definitions and acronyms 3.1 Terms and definitions For the purposes of this document, the terms and definitions of IEC 60050-191 apply together with the following: EN 60706-5:2007 7 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/04/2008 03:05, Uncontrolled Copy, (c) BSI3.1.1 built-i
49、n test BIT integrated capability of a test item enabling automatic fault recognition and fault localization 3.1.2 built-in test equipment BITE hardware and/or software assigned to the built-in test 3.1.3 commercial off-the-shelf COTS designates items readily available commercially 3.1.4 criticality significance attached to a malfunction NOTE Criticality is expressed in grades: the higher the grade, the more severe the consequences to be
