Enterprise Architecture at Work Modelling, Communication, and Analys
An enterprise architecture tries to describe and control an organisation’s structure, processes, applications, systems and techniques in an integrated way. The unambiguous specification and description of components and their relationships in such an arch
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Enterprise Architecture at Work
Marc Lankhorst et al.
Enterprise Architecture at Work Modelling, Communication, and Analysis With 167 Figures and 12 Tables
123
Marc Lankhorst
Telematica Instituut P.O. Box 589 7500 AN Enschede The Netherlands e-mail: [email protected]
Colour figures sponsored by ABN AMRO
AA_fullcolourU.eps ABN AMRO full-colour for uncoated paper Width shield: 20 mm Overlap: 0,05 mm
Library of Congress Control Number: 2005924300 ACM Computing Classification (1998): H.1, D.2.11, J.1
ISBN-10 3-540-24371-2 Springer Berlin Heidelberg New York ISBN-13 978-3-540-24371-7 Springer Berlin Heidelberg New York This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilm or in any other way, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer. Violations are liable for prosecution under the German Copyright Law. Springer is a part of Springer Science+Business Media springeronline.com © Springer-Verlag Berlin Heidelberg 2005 Printed in Germany The use of general descriptive names, registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. Cover design: KünkelLopka, Heidelberg Typesetting: by the Authors Production: LE-TeX Jelonek, Schmidt & Vöckler GbR, Leipzig Printed on acid-free paper 33/3142/YL - 5 4 3 2 1 0
Foreword
‘Architecture’, in a broad sense, is the synergy of art and science in designing complex structures, such that functionality and complexity are controlled. The notion of architecture is used in a wide range of domains, from town planning to building and construction, and from computer hardware to information systems, each being characterised by the types of ‘structures’ or ‘systems’ being designed. However, we can recognise some common concerns in all these approaches. To begin with, architecture, and hence the architect, is concerned with understanding and defining the relationship between the users of the system and the system being designed itself. Based on a thorough understanding of this relationship, the architect defines and refines the essence of the system, i.e., its structure, behaviour, and other properties. This representation of the system’s essence, also called the ‘architecture’ of the system, forms the basis for analysis, optimisation, and validation and is the starting point for the further design, implementation, and construction of that system. The resulting artifacts, be they buildings or information systems, naturally have to conform to the original design criteria. The definition of the architecture is the input fo
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