SANS 25021-2008 Software engineering - Software product Quality Requirements and Evaluation (SQuaRE) - Quality measure elements《软件工程 软件产品质量要求及评估(SQuaRE) 质量措施要素》.pdf

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3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21379-4 SANS 25021:2008Edition 1ISO/IEC TR 25021:2007Edition 1SOUTH AFRICAN NATIONAL STANDARD Software engineering Software product Qualit

4、y Requirements and Evaluation (SQuaRE) Quality measure elements This national standard is the identical implementation of ISO/IEC TR 25021:2007 and is adopted with the permission of the International Organization for Standardization and the International Electrotechnical Commission. Published by Sta

5、ndards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 25021:2008 Edition 1 ISO/IEC TR 25021:2007 Edition 1 Table of changes Change No. Date Scope National foreword Th

6、is South African standard was approved by National Committee StanSA SC 71C, Information technology ICT systems and software engineering, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in May 2008. Referen

7、ce numberISO/IEC TR 25021:2007(E)ISO/IEC 2007TECHNICAL REPORT ISO/IECTR25021First edition2007-10-15Software engineering Software productQuality Requirements and Evaluation (SQuaRE) Quality measure elements Ingnierie du logiciel Exigences de qualit et valuation du produit logiciel (SQuaRE) lments de

8、mesure de la qualit SANS 25021:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO/IEC TR 25021:2007(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or v

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13、Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO/IEC 2007 All rights reservedSANS 25021:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO/IEC TR 25021:2007(E) ISO/IEC 2007 All rights reserved

14、 iiiContents Page Foreword iv Introduction v 1 Scope 1 2 Conformance1 3 Normative references 1 4 Terms and definitions .2 5 Symbols and abbreviated terms 4 6 Quality measure elements concept .4 6.1 Quality measure elements in the Software Product Quality Measurement Reference Model (SPQM-RM) .4 6.2

15、Quality measure elements and their categories.6 6.3 Aspects of quality measure elements .6 6.4 Table format of quality measure elements8 7 Quality measure element categories .9 8 Set of quality measure elements11 8.1 Data Size .11 8.2 Number of Data Items13 8.3 Number of Failures 17 8.4 Number of Fa

16、ults .19 8.5 Number of Function.21 8.6 Number of I/O Events 29 8.7 Number of Requirements31 8.8 Number of Restarts32 8.9 Number of Tasks33 8.10 Number of Test Cases.35 8.11 Number of Trials 37 8.12 Product Size .38 8.13 Time Duration.39 Annex A (informative) Selected quality measures.42 Annex B (inf

17、ormative) Cross reference table between quality measures and quality measure element categories 45 Annex C (informative) Cross reference table between set of quality measure elements and quality measures 50 Bibliography 59 SANS 25021:2008This s tandard may only be used and printed by approved subscr

18、iption and freemailing clients of the SABS .ISO/IEC TR 25021:2007(E) iv ISO/IEC 2007 All rights reservedForeword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies

19、 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 interest. Other int

20、ernational 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 the rules give

21、n 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 requires approval b

22、y at least 75 % of the national bodies casting a vote. In exceptional circumstances, the joint technical committee may propose the publication of a Technical Report of one of the following types: type 1, when the required support cannot be obtained for the publication of an International Standard, d

23、espite repeated efforts; type 2, when the subject is still under technical development or where for any other reason there is the future but not immediate possibility of an agreement on an International Standard; type 3, when the joint technical committee has collected data of a different kind from

24、that which is normally published as an International Standard (“state of the art”, for example). Technical Reports of types 1 and 2 are subject to review within three years of publication, to decide whether they can be transformed into International Standards. Technical Reports of type 3 do not nece

25、ssarily have to be reviewed until the data they provide are considered to be no longer valid or useful. 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 pate

26、nt rights. ISO/IEC TR 25021, which is a Technical Report of type 2, was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 7, Software and systems engineering. The SQuaRE series of standards consists of the following divisions under the general title Softwar

27、e product Quality Requirements and Evaluation: Quality Management Division, Quality Model Division, Quality Measurement Division, Quality Requirements Division, and Quality Evaluation Division. SANS 25021:2008This s tandard may only be used and printed by approved subscription and freemailing client

28、s of the SABS .ISO/IEC TR 25021:2007(E) ISO/IEC 2007 All rights reserved vIntroduction The purpose of this Technical Report is to define an initial set of quality measure elements to be used throughout the software product life cycle for the purpose of Software Product Quality Requirement and Evalua

29、tion (SQuaRE). While the quality measure elements can be used for standalone measurement, their main purpose is to be used as the building blocks for other SQuaRE measures as described in ISO/IEC TR 9126-2, ISO/IEC TR 9126-3 and ISO/IEC TR 9126-4. The content of this Technical Report constitutes the

30、 link between ISO/IEC 9126 and the subsequent SQuaRE series of standards (Figure 1). Figure 1 Organization of SQuaRE series of standards During the period of transition from a Technical Report to an International Standard, the intention of this Technical Report is to be only a source of support for

31、the collection of quality measure elements. During this trial period, the applicability of this Technical Report and its content will be evaluated in the user environment. The support provided by this Technical Report for the measurement of software product quality is twofold: (a) assist in the sele

32、ction of the required quality measure elements for a given quality measure, and (b) provide guidance for collecting the selected measurements. The set of quality measures listed in this Technical Report arise from surveys involving several large commercial and academic institutions conducted during

33、the following research projects: Quality Measure Validation Survey (Prague University of Economics research project GACR 201/06/0175 and Czech University of Life Sciences in Prague research projects MSM6046070904 and 2C06004); Conformity of Industrial Software to International Standards ES (Excellen

34、t Software) Mark (Korean Agency for Technology and Standards, Korea); Project for Development fund of MII (China Ministry of Information Industry): software engineering standardization. Quality Model Division2501n QualityMeasurement Division2502nQuality Management Division2500nQuality Requirements D

35、ivision2503nQuality Evaluation Division2504n SANS 25021:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO/IEC TR 25021:2007(E) vi ISO/IEC 2007 All rights reservedNOTE This set does not contain quality measure elements for all ISO/IEC 91

36、26-1 Quality Model subcharacteristics. Some subcharacteristics were omitted because survey results did not find evidence of their use. It does not imply the ISO/IEC 9126-1 Quality Model should be changed, but rather new quality measures may need to be defined in the future. Subsequently the quality

37、measure elements necessary for measurement of the above quality measures set have been identified and documented. These quality measure elements represent an initial set of measures which can be used during the construction of quality measures referenced in ISO/IEC TR 9126-2, ISO/IEC TR 9126-3 and I

38、SO/IEC TR 9126-4, as well as other measures for other purposes. Quality measures described in the SQuaRE series (Figure 2) are derived from one or more quality measure elements described in this Technical Report. When evaluating a selected quality measure, the user should first review and evaluate t

39、he relevant quality measure element(s) listed in this Technical Report. Some important benefits from using the measures in this Technical Report are the following. To improve measurement productivity and consistency which will minimize measurement effort: When using quality measures such as internal

40、, external and quality in use, there is a possibility of duplicating the attribute measurement tasks, because they are usually performed as separate activities. However by identifying the set of quality measure elements that are uniquely required to derive all the quality measures for a given produc

41、t, these measurements need to be performed only once at the attribute level. This approach will improve the productivity of the measurement processes. Usability (guidance, cross reference): This Technical Report allows users to identify the possible indicators of quality (quality measures) that can

42、be derived by measuring one or more measures from a selected set of quality measure elements, and thereby maximizing the benefits from the measurement process. The quality measure elements are the common components of quality measures. The intention here is that users of this Technical Report will s

43、elect measures from quality measure elements for the purpose of defining internal, external or quality-in-use measures. These are then used for the definition of quality requirements (ISO/IEC 25030), software product evaluation (ISO/IEC 2504n), quality assessment and other purposes. It is therefore

44、strongly recommended to use this Technical Report and the other documents in the Quality Measurement Division together with the other relevant documents in the ISO/IEC 25000 series. Figure 2 Structure of the Quality Measurement Division SANS 25021:2008This s tandard may only be used and printed by a

45、pproved subscription and freemailing clients of the SABS .ISO/IEC TR 25021:2007(E) ISO/IEC 2007 All rights reserved viiQuality measure elements, together with the other support documentation offered in this Technical Report, provide added value to the ISO/IEC 9126 Technical Reports and International

46、 Standards by making them more understandable to users by clearly defining the relevant quality measure elements (Figure 3). In this sense, this Technical Report acts effectively as the common link between ISO/IEC 9126 and its follower, the SQuaRE series. Figure 3 The relationship of ISO/IEC TR 2502

47、1 as a link between the ISO/IEC 9126 and the SQuaRE series of standards 9126-4 Quality in Use 9126-3 Internal Metrics 9126-2 External Metrics SQuaRE Quality measures Measure 1 Measure 2 Measure 3 2502n 25021 Quality measure elements Quality measure element categories Quality measure elements 9126-1

48、Quality Model Quality characteristics Quality subcharacteristics SANS 25021:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .SANS 25021:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the

49、 SABS .TECHNICAL REPORT ISO/IEC TR 25021:2007(E) ISO/IEC 2007 All rights reserved 1Software engineering Software product Quality Requirements and Evaluation (SQuaRE) Quality measure elements 1 Scope This Technical Report specifies an initial set of quality measure elements in order to assist users of ISO/IEC TR 9126-2, ISO/IEC TR 9126-3 and ISO/IEC TR 9126-4 and users of the SQuaRE series of quality measurement standards ISO/IEC 2502n in the selection and use of the qua