Software Engineering for Students A Programming Approach

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Software Engineering for Students A Programming Approach Fourth Edition DOUGLAS BELL
Pearson Education Limited Edinburgh Gate Harlow Essex CM20 2JE England and Associated Companies throughout the world Visit us on the World Wide Web at: www.pearsoned.co.uk First published under the Prentice Hall imprint 1987 Second edition 1992 Third edition 2000 Fourth edition 2005 © Prentice Hall International 1987, 1992 © Pearson Education Limited 2000, 2005 The right of Douglas Bell to be identified as author of this work has been asserted by him in accordance with the Copyright, Designs and Patents Act 1988. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without either the prior written permission of the publisher or a licence permitting restricted copying in the United Kingdom issued by the Copyright Licensing Agency Ltd, 90 Tottenham Court Road, London W1T 4LP. The programs in this book have been included for their instructional value. They have been tested with care but are not guaranteed for any particular purpose. The publisher does not offer any warranties or representations nor does it accept any liabilities with respect to the programs. All trademarks used herein are the property of their respective owners. The use of any trademark in this text does not vest in the author or publisher any trademark ownership rights in such trademarks, nor does the use of such trademarks imply any affiliation with or endorsement of this book by such owners. ISBN 0 321 26127 5 British Library Cataloguing-in-Publication Data A catalogue record for this book is available from the British Library Library of Congress Cataloging-in-Publication Data Bell, Doug, 1944- Software engineering for student/Douglas Bell. -- 4th ed. p. cm. Rev. ed. of: Software engineering. 2000. ISBN 0-321-26127-5 1. Software engineering. 2. Computer programming. I. Bell, Doug, 1944- Software engineering. II. Title. QA76.758.B45 2005 005.1--dc22 2004062346 10987654321 09 08 07 06 05 Typeset in 9.75/12pt Galliard by 71 Printed in Great Britain by Henry Ling Ltd, at the Dorset Press, Dorchester, Dorset The publisher’s policy is to use paper manufactured from sustainable forests.
Page 1 and 2: Software Engineering for Students D
Page 3: We work with leading authors to dev
Page 7 and 8: vi Contents Part D ● Verification
Page 9 and 10: viii Detailed contents 3 The feasib
Page 11 and 12: x Detailed contents 9 Data flow des
Page 13 and 14: xii Detailed contents 14.7 Repetiti
Page 15 and 16: xiv Detailed contents 19.7 Unit tes
Page 17 and 18: xvi Detailed contents 26 Agile meth
Page 19 and 20: xviii Detailed contents 32.4 Softwa
Page 21 and 22: xx Preface Software Engineering and
Page 23 and 24: xxii Preface are engaged on a proje
Page 26 and 27: CHAPTER 1 This chapter: ■ reviews
Page 28 and 29: 1.3 The cost of software production
Page 30 and 31: 100% 10% 1970 SELF-TEST QUESTION Ha
Page 32 and 33: Analysis and design 1 /3 Coding 1 /
Page 34 and 35: SELF-TEST QUESTION 1.7 Maintenance
Page 36 and 37: 1.8 Reliability 13 in the first pla
Page 38 and 39: 1.8 Reliability 15 contain a comma
Page 40 and 41: Ease of maintenance Reliability Con
Page 42 and 43: Exercises 19 • Exercises These ex
Page 44 and 45: Further reading 21 Analyses of the
Page 46 and 47: ■ documentation ■ maintenance
Page 48 and 49: 2.2 The tasks 25 An important examp
Page 50 and 51: 2.4 Methodology 27 reality. Like an
Page 52 and 53: ■ error free ■ fault ■ tested
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3.2 ● Technical feasibility 3.3 C
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3.5 Case study 33 The hardware cost
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Answers to self-test questions 3.1
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4.2 The concept of a requirement 37
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4.3 The qualities of a specificatio
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4.5 The requirements specification
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4.6 The structure of a specificatio
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4.7 ● Use cases 4.7 Use cases 45
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Summary The ideal characteristics o
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Further reading 49 Further reading
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CHAPTER 5 This chapter explains: 5.
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5.3 Styles of human-computer interf
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5.5 Design principles and guideline
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5.5 Design principles and guideline
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SELF-TEST QUESTION 5.2 What problem
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5.8 Help systems 63 Our plan is to
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Further reading 65 5.5 Design a use
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CHAPTER 6 Modularity This chapter e
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6.2 Why modularity? 69 observed fau
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Figure 6.1 Two alternative software
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■ a simple program is more likely
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6.6 Information hiding 75 The class
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6.8 ● Coupling 6.8 Coupling 77 We
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6. Method calls with parameters tha
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3. Temporal cohesion 6.9 Cohesion 8
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> } public void setY(int newY) { y
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• Exercises 6.1 What is modularit
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CHAPTER 7 Structured programming Th
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7.2 Arguments against goto 89 If we
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■ if-then-else ■ while-do or re
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7.3 Arguments in favor of goto 93 l
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7.4 Selecting control structures 95
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while do if endif then else endWhil
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• Exercises 7.1 Review the argume
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count = 0 loop: count = count + 1 i
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> 8.2 Case study 103 A statement th
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start button event create defender
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8.3 ● Discussion Abstraction One
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Exercises 109 skill. On the other h
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CHAPTER 9 This chapter explains: 9.
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9.2 Identifying data flows 113 Noti
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9.3 Creation of a structure chart 1
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SELF-TEST QUESTION 9.4 Discussion 1
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Exercises 119 During the second sta
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CHAPTER 10 This chapter explains:
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In English, this reads: 10.2 A simp
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10.2 A simple example 125 Now comes
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10.4 Multiple input and output stre
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Process header Process issue 10.4 M
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10.5 Structure clashes 131 As seen
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10.5 Structure clashes 133 Let us r
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10.6 Discussion 135 ■ teachable -
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Exercises 137 2. a control block, s
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CHAPTER 11 Object-oriented design T
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Figure 11.1 The cyberspace invaders
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SELF-TEST QUESTION 11.1 Derive info
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11.5 Class-responsibility-collabora
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11.7 ● Discussion Summary 147 OOD
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11.11 Compare and contrast the prin
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CHAPTER 12 This chapter explains: 1
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12.3 Delegation 153 The concepts of
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12.5 Factory method 155 The followi
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12.8 Model, view controller (observ
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Figure 12.4 Pipe and Filter pattern
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Figure 12.6 Layers in a distributed
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Answers to self-test questions 163
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CHAPTER 13 Refactoring This chapter
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13.3 ● Move Method 13.6 Inline Cl
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class Sprite Instance variables x y
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Summary Summary 171 it is making po
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PART C PROGRAMMING LANGUAGES
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176 Chapter 14 ■ The basics and a
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178 Chapter 14 ■ The basics > > >
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180 Chapter 14 ■ The basics > Ear
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182 Chapter 14 ■ The basics > Cas
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184 Chapter 14 ■ The basics > > >
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186 Chapter 14 ■ The basics > } }
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188 Chapter 14 ■ The basics Unfor
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190 Chapter 14 ■ The basics Ada d
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192 Chapter 14 ■ The basics The w
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194 Chapter 14 ■ The basics In a
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196 Chapter 14 ■ The basics > str
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198 Chapter 14 ■ The basics Answe
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CHAPTER 15 Object-oriented programm
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202 Chapter 15 ■ Object-oriented
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222 Chapter 16 ■ Programming in t
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238 Chapter 17 ■ Software robustn
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260 Chapter 18 ■ Scripting GNU/Li
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262 Chapter 18 ■ Scripting In sum
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PART D VERIFICATION
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268 Chapter 19 ■ Testing We begin
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270 Chapter 19 ■ Testing within a
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272 Chapter 19 ■ Testing Test num
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274 Chapter 19 ■ Testing if (a >=
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276 Chapter 19 ■ Testing 3. apply
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278 Chapter 19 ■ Testing made con
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280 Chapter 19 ■ Testing 19.3 Dev
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282 Chapter 19 ■ Testing 19.2 The
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284 Chapter 20 ■ Groups The term
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286 Chapter 20 ■ Groups Of course
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288 Chapter 20 ■ Groups • Exerc
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CHAPTER 21 This chapter explains: 2
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Stage Input Output 21.3 Feedback be
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Summary The essence and the strengt
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CHAPTER 22 This chapter: 22.1 ● I
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22.2 The spiral model 299 to try to
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22.4 ● Discussion Exercises 301 A
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CHAPTER 23 Prototyping This chapter
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Therefore, in summary: ■ the prod
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23.5 Evolutionary prototyping 307 U
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Reuse components 23.6 Rapid prototy
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Pitfalls For users, the problems of
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Answers to self-test questions 313
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24.2 ● Big-bang implementation 24
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Tested component Figure 24.1 Top-do
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24.7 ● Use case driven implementa
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■ middle-out ■ use case based.
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SELF-TEST QUESTION 25.1 What is the
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sharing of software or their own re
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Summary 327 Inappropriate patches,
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Further reading 329 Cathedral and t
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These are qualified by the statemen
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26.3 Extreme programming 333 develo
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SELF-TEST QUESTION 26.3 Which of th
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CHAPTER 27 This chapter explains:
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Figure 27.1 The phases of the unifi
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27.5 ● Iteration 27.6 Case study
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The transition phase Summary 343 Th
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PART F PROJECT MANAGEMENT
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348 Chapter 28 ■ Teams The commun
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350 Chapter 28 ■ Teams Level of s
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352 Chapter 28 ■ Teams A chief pr
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354 Chapter 28 ■ Teams benefits o
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356 Chapter 28 ■ Teams • Furthe
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358 Chapter 29 ■ Software metrics
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372 Chapter 30 ■ Project manageme
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31.3 Case study - assessing verific
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31.5 A single development method? 3
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Further reading 391 31.2 Draw up a
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32.3 ● The world of programming l
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32.5 ● The real world of software
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32.6 Control versus skill 397 Final
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Formal methods 32.7 Future methods
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Summary 401 In the short-term futur
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Further reading 403 An extensive tr
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APPENDIX A Case studies are used th
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Figure A.1 Cyberspace invaders A.4
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APPENDIX B Glossary Within the fiel
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C.2 ● Class diagrams C.2 Class di
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util Figure C.6 A package diagram S
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References to books and websites ar
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abstraction 99, 107 acceptance test
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fork 324 formal methods 276, 388, 3
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quality 18, 362 quality assurance 1
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