1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO/IEC 25045:2010Systems and softwareengineering Systems andsoftware Quality Requirementsand Evaluation (SQuaRE) Evaluation module forrecoverabilityBS ISO/IEC 25045:2010 BRIT
2、ISH STANDARDNational forewordThis British Standard is the UK implementation of ISO/IEC25045:2010.The UK participation in its preparation was entrusted to TechnicalCommittee IST/15, Software and systems engineering.A list of organizations represented on this committee can beobtained on request to its
3、 secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 66893 7ICS 35.080Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was publi
4、shed under the authority of theStandards Policy and Strategy Committee on 30 September 2010.Amendments issued since publicationDate Text affectedBS ISO/IEC 25045:2010Reference numberISO/IEC 25045:2010(E)ISO/IEC 2010INTERNATIONAL STANDARD ISO/IEC25045First edition2010-09-01Systems and software engine
5、ering Systems and software Quality Requirements and Evaluation (SQuaRE) Evaluation module for recoverability Ingnierie des systmes et du logiciel Exigences de qualit et valuation des systmes et du logiciel (SQuaRE) Module dvaluation pour la possibilit de rcupration BS ISO/IEC 25045:2010ISO/IEC 25045
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10、dress below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO/IEC 2010 All rights reservedBS ISO/IEC 25045:2010ISO/IEC 25045:
11、2010(E) ISO/IEC 2010 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 1.1 Characteristics.1 1.2 Level of evaluation 1 1.3 Technique.1 1.4 Applicability .2 2 Conformance .2 3 Normative references2 4 Terms and definitions .3 5 Inputs and measures.3 5.1 Evaluation methodology.3
12、5.1.1 Practical considerations relating to the methodology 5 5.1.2 Disturbances5 5.2 Input for the evaluation.8 5.2.1 The SUT description8 5.2.2 The workload description.9 5.2.3 The fault load description.10 5.3 Data elements 11 5.3.1 Output from the baseline run .11 5.3.2 Output from the test run .
13、11 5.3.3 Completion of the Autonomic Maturity Questionnaire12 5.4 Quality Measures.12 5.4.1 Summary of the Quality Measures and Quality Measure Elements (QME) .12 5.4.2 Quality Measure - Resiliency12 5.4.3 Quality Measure - Autonomic Recovery Index.13 5.4.4 Quality Measure Element (QME) - Number of
14、transactions under disturbance.15 5.4.5 Quality Measure Element (QME) - Number of transactions under no disturbance 16 5.4.6 Quality Measure Element (QME) - Autonomic Maturity Score16 6 Interpretation of results 17 6.1 Mapping of measures17 6.2 Reporting17 6.3 Application Procedure 17 Annex A (infor
15、mative) Sample Report .18 Bibliography37 BS ISO/IEC 25045:2010ISO/IEC 25045:2010(E) iv ISO/IEC 2010 All rights reservedForeword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization.
16、National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual inte
17、rest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. International Standards are drafted in accordance with
18、 the rules given in the ISO/IEC Directives, Part 2. The main task of the joint technical committee is to prepare International Standards. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requ
19、ires approval by at least 75 % of the national bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC 25045 was prepa
20、red by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 7, Software and systems engineering. ISO/IEC 25045 is one of the SQuaRE series of International Standards, which consists of the following divisions under the general title Systems and software engineering System
21、s and software Quality Requirements and Evaluation (SQuaRE): Quality Management Division (ISO/IEC 2500n), Quality Model Division (ISO/IEC 2501n), Quality Measurement Division (ISO/IEC 2502n), Quality Requirements Division (ISO/IEC 2503n), Quality Evaluation Division (ISO/IEC 2504n). BS ISO/IEC 25045
22、:2010ISO/IEC 25045:2010(E) ISO/IEC 2010 All rights reserved vIntroduction The evaluation of software product quality is vital to both the acquisition and development of software that meets quality requirements. The relative importance of the various characteristics of software quality depends on the
23、 mission or objectives of the system of which it is a part; software products need to be evaluated to decide whether relevant quality characteristics meet the requirements of the system. The essential parts of software quality evaluation are a quality model, the method of evaluation, software measur
24、ement, and supporting tools. To develop good software, quality requirements should be specified, the software quality assurance process should be planned, implemented and controlled, and both intermediate products and end products should be evaluated. This International Standard is part of the SQuaR
25、E series of International Standards. It contains general requirements for specification and evaluation of systems and software quality and clarifies the associated general concepts. It provides a framework for evaluating the quality of software products and states the requirements for methods of sof
26、tware product measurement and evaluation. The general goal of creating the SQuaRE series of International Standards is to move to a logically organized, enriched and unified series covering two main processes: software quality requirements specification and software quality evaluation, supported by
27、a software quality measurement process. The purpose of the SQuaRE series of International Standards is to assist those developing and acquiring software products with the specification and evaluation of quality requirements. It establishes criteria for the specification of systems and software quali
28、ty requirements, their measurement, and evaluation. It includes a two-part quality model for aligning customer definitions of quality with attributes of the development process. In addition, the series provides recommended measures of software product quality attributes that can be used by developer
29、s, acquirers, and evaluators. SQuaRE provides terms and definitions, reference models, a general guide, individual division guides, and International Standards for requirements specification, planning and management, measurement and evaluation purposes. SQuaRE includes International Standards on qua
30、lity model and measures, as well as on quality requirements and evaluation. SQuaRE replaces the current ISO/IEC 9126 series and the ISO/IEC 14598 series. ISO/IEC 25040, Systems and software engineering Systems and software Quality Requirements and Evaluation (SQuaRE) Evaluation reference model and g
31、uide will replace a part of ISO/IEC 14598-1, Information technology Software product evaluation Part 1: General overview. ISO/IEC 25041, Systems and software engineering Systems and software Quality Requirements and Evaluation (SQuaRE) Evaluation modules will replace ISO/IEC 14598-6, Software engine
32、ering Product evaluation Documentation of evaluation modules. ISO/IEC 25001, Software engineering Software product Quality Requirements and Evaluation (SQuaRE) Planning and management replaces ISO/IEC 14598-2, Software engineering Product evaluation Part 2: Planning and management. BS ISO/IEC 25045:
33、2010ISO/IEC 25045:2010(E) vi ISO/IEC 2010 All rights reservedQualityRequirementsDivision2503nQualityEvaluationDivision2504nQuality ModelDivision2501nQuality Measurement Division2502nQuality Management Division2500nFigure 1 Organization of the SQuaRE series of International Standards Figure 1 illustr
34、ates the organization of the SQuaRE series, representing families of standards, also called divisions. The divisions within SQuaRE model are: ISO/IEC 2500n - Quality Management Division. The International Standards that form this division define all common models, terms and definitions further refer
35、red to by all other International Standards from the SQuaRE series. Referring paths (guidance through SQuaRE documents) and high level practical suggestions in applying proper standards to specific application cases offer help to all types of users. The division also provides requirements and guidan
36、ce for a supporting function which is responsible for the management of software product requirements specification and evaluation. ISO/IEC 2501n - Quality Model Division. The International Standard that forms this division presents a detailed quality model including internal, external and quality i
37、n use characteristics. Furthermore, the internal and external software quality characteristics are decomposed into sub-characteristics. Practical guidance on the use of the quality model is also provided. ISO/IEC 2502n - Quality Measurement Division. The International Standards that form this divisi
38、on include a software product quality measurement reference model, mathematical definitions of quality measures, and practical guidance for their application. Presented measures apply to internal software quality, external software quality and quality in use. Measurement primitives forming foundatio
39、ns for the latter measures are defined and presented. ISO/IEC 2503n - Quality Requirements Division. The International Standard that forms this division helps in specifying quality requirements. These quality requirements can be used in the process of quality requirements elicitation for a software
40、product to be developed or as input for an evaluation process. The requirements definition process is mapped to technical processes defined in ISO/IEC 15288, Systems and software engineering System life cycle processes. ISO/IEC 2504n - Quality Evaluation Division. The International Standards that fo
41、rm this division provide requirements, recommendations and guidelines for software product evaluation, whether performed by evaluators, acquirers or developers. The support for documenting a measure as an Evaluation Module is also presented. BS ISO/IEC 25045:2010ISO/IEC 25045:2010(E) ISO/IEC 2010 Al
42、l rights reserved viiThis International Standard is part of the Quality Evaluation Division (ISO/IEC 2504n), which consists of the following International Standards (see Figure 2). ISO/IEC 250401), Systems and software engineering Systems and software Quality Requirements and Evaluation (SQuaRE) Eva
43、luation reference model and guide, contains general requirements for specification and evaluation of software quality and clarifies the general concepts. It provides a process description for evaluating the quality of software products and states the requirements for the application of this process.
44、 The evaluation process is the basis for software product quality evaluation for different purposes and approaches. Therefore, the process can be used for the evaluation of quality in use, external software quality and internal software quality. It can also be applied to evaluate the quality of pre-
45、developed software or custom software during its development process. The software product quality evaluation can be conducted by an acquirer, a developer organization, a supplier or an independent third party evaluator. ISO/IEC 250412), Systems and software engineering Systems and software Quality
46、Requirements and Evaluation (SQuaRE) Evaluation modules, defines the structure and content of the documentation to be used to describe an evaluation module. These evaluation modules contain the specification of the quality model (i.e. characteristics, sub-characteristics and corresponding internal,
47、external or quality in use measures), the associated data and information about the planned application of the model and the information about its actual application. Appropriate evaluation modules are selected for each evaluation. In some cases, it might be necessary to develop new evaluation modul
48、es. Guidance for developing new evaluation modules is found in ISO/IEC 25041. This International Standard can also be used by organizations producing new evaluation modules. ISO/IEC 25045, Systems and software engineering Systems and software Quality Requirements and Evaluation (SQuaRE) Evaluation m
49、odule for recoverability provides the specification to evaluate the sub-characteristic of recoverability defined under the characteristic of reliability of the quality model. The ability of a software product and thereby a system to remain available or to recover within an acceptable timeframe from disturbance has always been important since a down time often has economic and other consequences. The emphasis in recent years has extended to the autonomic abilit
