Software engineering 9 summer

Software Engineering 9 summer
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Unformatted text preview: SOFTWARE ENGINEERING Ninth Edition Ian Sommerville Addison-Wesley Boston Columbus Indianapolis New York San Francisco Upper Saddle River Amsterdam Cape Town Dubai London Madrid Milan Munich Paris Montreal Toronto Delhi Mexico City São Paulo Sydney Hong Kong Seoul Singapore Taipei Tokyo Editorial Director: Marcia Horton Editor in Chief: Michael Hirsch Acquisitions Editor: Matt Goldstein Editorial Assistant: Chelsea Bell Managing Editor: Jeff Holcomb Senior Production Project Manager: Marilyn Lloyd Director of Marketing: Margaret Waples Marketing Coordinator: Kathryn Ferranti Senior Manufacturing Buyer: Carol Melville Text Designer: Susan Raymond Cover Art Director: Elena Sidorova Front Cover Photograph: © Jacques Pavlovsky/Sygma/Corbis Interior Chapter Opener: © Full-Service Project Management: Andrea Stefanowicz, GGS Higher Education Resources, a Division of PreMedia Global, Inc. Composition and Illustrations: GGS Higher Education Resources, a Division of PreMedia Global, Inc. Printer/Binder: Edwards Brothers Cover Printer: Lehigh-Phoenix Color/Hagerstown Copyright © 2011, 2006, 2005, 2001, 1996 Pearson Education, Inc., publishing as Addison-Wesley. All rights reserved. Manufactured in the United States of America. This publication is protected by copyright, and permission should be obtained from the publisher prior to any prohibited reproduction, storage in a retrieval system, or transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. To obtain permission(s) to use material from this work, please submit a written request to Pearson Education, Inc., Permissions Department, 501 Boylston Street, Suite 900, Boston, Massachusetts 02116. Many of the designations by manufacturers and seller to distinguish their products are claimed as trade-marks. Where those designations appear in this book, and the publisher was aware of a trademark claim, the designations have been printed in initial caps or all caps. Library of Congress Cataloging-in-Publication Data Sommerville, Ian Software engineering / Ian Sommerville. 9th ed. p. cm. Includes index. ISBN-13: 978-0-13-703515-1 ISBN-10: 0-13-703515-2 1. Software engineering. I. Title. QA76.758.S657 2011 005.1dc22 2009053058 10 9 8 7 6 5 4 3 2 1EB14 13 12 11 10 ISBN 10: 0-13-703515-2 ISBN 13: 978-0-13-703515-1 PREFACE As I was writing the final chapters in this book in the summer of 2009, I realized that software engineering was 40 years old. The name software engineering was proposed in 1969 at a NATO conference to discuss software development problems large software systems were late, did not deliver the functionality needed by their users, cost more than expected, and were unreliable. I did not attend that conference but, a year later, I wrote my first program and started my professional life in software....
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