1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO/IEC 14143-6:2012Information technology Software measurement Functional size measurement Part 6: Guide for use of ISO/IEC 14143 series and related International Stand-ards
2、BS ISO/IEC 14143-6:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO/IEC 14143-6:2012. It supersedes BS ISO/IEC 14143-6:2006 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee IST/15, Software and systems engineer
3、ing.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2012. Published by BSI S
4、tandards Limited 2012ISBN 978 0 580 76250 5 ICS 35.080 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2012.Amendments issued since publicationDate T
5、ext affectedBS ISO/IEC 14143-6:2012Reference numberISO/IEC 14143-6:2012(E)ISO/IEC 2012INTERNATIONALSTANDARD ISO/IEC14143-6Second edition2012-11-01Information technology Softwaremeasurement Functional sizemeasurement Part 6: Guide for use of ISO/IEC 14143 series andrelated International Standards Tec
6、hnologies de linformation Mesurage du logiciel Mesurage dela taille fonctionnelle Partie 6: Guide pour lusage de la srie ISO/CEI 14143 et des Normesinternationales connexes BS ISO/IEC 14143-6:2012ISO/IEC 14143-6:2012(E) COPYRIGHT PROTECTED DOCUMENT ISO/IEC 2012 All rights reserved. Unless otherwise
7、specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright offi
8、ce 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 2012 All rights reservedBS ISO/IEC 14143-6:2012ISO/IEC 14143-6:2012(E) ISO/IEC 2012 All rights reserved iiiContents Page Foreword iv Introduct
9、ion . v 1 Scope 1 2 Abbreviated terms . 1 3 FSM related standards (ISO/IEC 14143 series), FSMM standards, and their interrelationships 2 3.1 Outlines of FSM related standards 2 3.2 Outlines of standardized FSMMs . 4 3.3 Relationship between FSM related standards 6 3.4 Guidelines for usage of FSM rel
10、ated standards . 8 4 Use of FSM and FS 8 4.1 Overview . 8 4.2 Project management . 9 4.3 Performance management . 10 5 FSMM selection and development processes 10 5.1 Outline 10 5.2 Process to select a suitable FSMM 11 5.3 FSMM development process 13 Annex A (Informative) Scope of FSM related standa
11、rds . 15 A.1 ISO/IEC 14143 series . 15 A.2 ISO/IEC International Standards of FSMMs 17 Bibliography 21 BS ISO/IEC 14143-6:2012ISO/IEC 14143-6:2012(E) iv ISO/IEC 2012 All rights reservedForeword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commi
12、ssion) form the specialized system for worldwide standardization. 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
13、 and IEC technical committees collaborate in fields of mutual interest. 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
14、/IEC JTC 1. International Standards are drafted in accordance with 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 nationa
15、l bodies for voting. Publication as an International Standard requires 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 part of document may be the subject of patent rights. ISO and IEC shall not be held responsi
16、ble for identifying any or all such patent rights. ISO/IEC 14143-6 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 7, Software and systems engineering. ISO/IEC 14143 consists of the following parts, under the general title Information technology Softw
17、are measurement Functional size measurement: Part 1: Definition of concepts Part 2: Conformity evaluation of software size measurement methods to ISO/IEC 14143-1 Part 3: Verification of functional size measurement methods Technical Report Part 4: Reference model Technical Report Part 5: Determinatio
18、n of functional domains for use with functional size measurement Technical Report Part 6: Guide for use of ISO/IEC 14143 series and related International Standards This second edition cancels and replaces the first edition (ISO/IEC 14143-6:2006), which has been technically revised. BS ISO/IEC 14143-
19、6:2012ISO/IEC 14143-6:2012(E) ISO/IEC 2012 All rights reserved vIntroduction Functional Size Measurement (FSM) is a technique used to measure size of software by quantifying the Functional User Requirements of the software. The first published method to embrace this concept was Function Point Analys
20、is, developed by Allan J. Albrecht in the late 1970s. Since then, numerous extensions and variations of the original method have been developed. In the field of ISO/IEC International Standards, the following Functional Size Measurement-related International Standards and Technical Reports have been
21、published: ISO/IEC 14143 series, parts 1 to 5, ISO/IEC 19761 (COSMIC method), ISO/IEC 20926 (IFPUG method) ISO/IEC 20968 (Mk II method), ISO/IEC 24570 (NESMA method), and ISO/IEC 29881 (FiSMA method). This part of ISO/IEC 14143 was established to provide FSM Method users and developers with a guide
22、as to how these International Standards and Technical Reports relate to each other and how to use them. The Functional Size (FS) obtained by measuring a piece of software, contributes to a better understanding of the characteristics of the software as well as the development, maintenance and support
23、 activities thereof. The three types of International Standards and Technical Reports related to the definition and use of FS and/or Functional Size Measurement (FSM) are: a) Concept Standards: Describe concepts and provide definitions, b) Supporting Standards: Supply information to assist in the ev
24、aluation of Functional Size Measurement Methods (FSMM) and examples of the software domains that they measure, and c) Method Standards: Define instances of FSMMs. Any FSMM, other than the Method Standards, can be used to measure FS as long as it conforms to ISO/IEC 14143-1. FSMMs can vary in their c
25、apability to measure software in different domains. Therefore, before deciding on which FSMM to use, it is advisable to assess the capability of the method to adequately size the software to be measured. This part of ISO/IEC 14143 provides guidance on how to select a suitable FSMM using all FSM-rela
26、ted standards. The FS results obtained from applying the selected FSMM can be used for a variety of purposes throughout the lifecycle of the software. This part of ISO/IEC 14143 also provides illustrative examples of how to use FSM and functional size to manage aspects of software development and ma
27、intenance. BS ISO/IEC 14143-6:2012BS ISO/IEC 14143-6:2012INTERNATIONAL STANDARD ISO/IEC 14143-6:2012(E) ISO/IEC 2012 All rights reserved 1Information technology Software measurement Functional size measurement Part 6: Guide for use of ISO/IEC 14143 series and related International Standards 1 Scope
28、This part of ISO/IEC 14143 provides a summary of the FSM-related standards and the relationship between; a) the ISO/IEC 14143 series FSM framework International Standards that provide the definitions and concepts of FSM, and conformity and verification of FSMMs, and b) the ISO/IEC standard FSMMs, i.
29、e. ISO/IEC 19761, ISO/IEC 20926, ISO/IEC 20968, ISO/IEC 24570 and ISO/IEC 29881. This part of ISO/IEC 14143 also provides a process to assist users to select and develop an FSMM that meets their requirements as well as providing guidance on how to use FS. FSMMs include, but are not limited to, ISO/I
30、EC 19761, ISO/IEC 20926, ISO/IEC 20968, ISO/IEC 24570 and ISO/IEC 29881. NOTE An FSMM is a software sizing method that conforms to the mandatory requirements of ISO/IEC 14143-1. Recommending a specific FSMM is outside the scope of this part of ISO/IEC 14143. The audiences of this part of ISO/IEC 141
31、43 are: users and potential users of FSM; and developers of an FSMM. 2 Abbreviated terms BFC Base Functional Component FS Functional Size FSM Functional Size Measurement FSMM Functional Size Measurement Method FUR Functional User Requirements RUR Reference User Requirements BS ISO/IEC 14143-6:2012IS
32、O/IEC 14143-6:2012(E) 2 ISO/IEC 2012 All rights reserved3 FSM related standards (ISO/IEC 14143 series), FSMM standards, and their interrelationships 3.1 Outlines of FSM related standards 3.1.1 Overview FSM is an approach used to measure software size by quantifying the FUR of the software. Over time
33、 numerous methods have been devised to do this of which five of them conform to ISO/IEC 14143-1 became the International Standards. Although these methods vary in the rules they use to measure software, they all focus on measuring FUR of software. ISO/IEC 14143-1 defines concepts of FSM and FSMM. Su
34、bsequent parts of ISO/IEC 14143 (ISO/IEC 14143 series) have been developed to evaluate FSMMs. The following clauses outline these FSM related standards. NOTE For copies of the Scope clauses of the FSM related standards, refer to Annex A of this part of ISO/IEC 14143. 3.1.2 ISO/IEC 14143-1 ISO/IEC 14
35、143-1 is a Concept Standard and is a basis for other International Standards and Technical Reports that are categorized as Supporting Standards and Method Standards. ISO/IEC 14143-1 is the foundation standard of the series and has the following contents; a) Definitions b) Characteristics of FSMMs c)
36、 Requirements for FSMMs d) Process for applying an FSMM e) FSMM labeling conventions f) Conformity evidence ISO/IEC 14143-1 is an International Standard. 3.1.3 ISO/IEC 14143-2 ISO/IEC 14143-2 is a Supporting Standard. ISO/IEC 14143-2 defines processes to check conformity of a Candidate FSMM with ISO
37、/IEC 14143-1. NOTE While conformity can be assessed in another method, using ISO/IEC 14143-2 is recommended. ISO/IEC 14143-2 has the following contents; a) Evaluator characteristics b) Inputs to conformity evaluation c) Tasks and steps of the conformity evaluation procedure d) Conformity evaluation
38、outputs BS ISO/IEC 14143-6:2012ISO/IEC 14143-6:2012(E) ISO/IEC 2012 All rights reserved 3e) Conformity evaluation result In addition, there are the following annexes; a) Evaluator capability (Informative) b) Example of a conformity evaluation checklist (Informative) c) Example of a conformity evalua
39、tion report (Informative) ISO/IEC 14143-2 is an International Standard. 3.1.4 ISO/IEC TR 14143-3 ISO/IEC TR 14143-3 is a Supporting Standard. For FSMM users wanting to evaluate the most suitable method for their needs or for developers who want to check their FSMM performance claims, ISO/IEC TR 1414
40、3-3 provides a process to assess the performance properties of an FSMM. While there are many ways to do the verification, the use of ISO/IEC TR 14143-3 is recommended. ISO/IEC TR 14143-3 has the following contents; a) Verification team competency and responsibility b) Verification inputs c) Verifica
41、tion procedure d) Verification outputs In addition, it includes the following annexes; a) Presentation of test requests (Normative) b) Verification methods (Normative) c) Example of a verification report (Informative) ISO/IEC TR 14143-3 is a Type 2 Technical Report. 3.1.5 ISO/IEC TR 14143-4 ISO/IEC
42、TR 14143-4 is a Supporting Standard. ISO/IEC TR 14143-4 provides a collection of Reference User Requirements (RUR), which are useful for comparing the FSM results among FSMMs. It also contains guidance on selecting Reference FSMMs. Together with ISO/IEC TR 14143-3, it enables the collection of norma
43、tive, quantitative evidence of the performance of the FSMM. ISO/IEC TR 14143-4 has the following requirements; a) Reference User Requirements b) Reference FSMMs In addition, it includes the following example Reference User Requirements in annexes; a) Business application RUR (Normative) BS ISO/IEC 1
44、4143-6:2012ISO/IEC 14143-6:2012(E) 4 ISO/IEC 2012 All rights reservedb) Real time / Control RUR (Normative) c) RUR reference list (Informative) ISO/IEC TR 14143-4 is a Type 2 Technical Report. 3.1.6 ISO/IEC TR 14143-5 ISO/IEC TR 14143-5 is a Supporting Standard. ISO/IEC TR 14143-5 was developed to d
45、escribe the Functional Domains (“software types”) to which a piece of software belongs or to which an FSMM can declare its applicability (as required by ISO/IEC 14143-1). ISO/IEC TR 14143-5 provides a means to determine Functional Domains by describing the characteristics of Functional Domains and t
46、he procedures by which characteristics of FUR can be used to determine Functional Domains. Two example methods for implementing these characteristics and procedures are provided in the Informative Annexes. ISO/IEC TR 14143-5 provides a process by which to define Functional Domains. ISO/IEC TR 14143-
47、5 has the following contents; a) General requirements for Functional Domains b) General requirements for characteristics of Functional Domains c) Determining the Functional Domain for a given set of FUR d) Determining the applicability of an FSMM to a particular Functional Domain e) Example Function
48、al Domain categorization methods In addition, it includes the following informative annexes; a) CHAR Method to determine Functional Domains (Informative) b) BFC type method to determine Functional Domains (Informative) ISO/IEC TR 14143-5 is a Type 2 Technical Report. 3.2 Outlines of standardized FSM
49、Ms 3.2.1 Method Standards ISO/IEC provides five standardized FSMMs. They are; ISO/IEC 19761 (COSMIC method), ISO/IEC 20926 (IFPUG method), ISO/IEC 20968 (Mk II method), ISO/IEC 24570 (NESMA method), and ISO/IEC 29881 (FiSMA method). NOTE For ease of readability, the current collection of five ISO FSMMs as outlined above will be referred to as “existing ISO/IEC-standardized FSMMs” from this point forward except where a single FSMM is referred. BS ISO/IEC 14143-6:2012ISO/IEC 14143-6:2012(E
