Architecture Principles The Cornerstones of Enterprise Architecture
Enterprises, from small to large, evolve continuously. As a result, their structures are transformed and extended continuously. Without some means of control, such changes are bound to lead to an overly complex, uncoordinated and heterogeneous environment
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Danny Greefhorst Erik Proper
Architecture Principles The Cornerstones of Enterprise Architecture
Danny Greefhorst ArchiXL B.V. Nijverheidsweg Noord 60-27 Amersfoort 3812 PM The Netherlands [email protected]
Erik Proper Public Research Centre Henri Tudor 29, avenue John F. Kennedy 1855 Luxembourg-Kirchberg Luxembourg [email protected]
The publication of this book was sponsored by:
In writing this book, the authors were kindly supported by:
ISBN 978-3-642-20278-0 e-ISBN 978-3-642-20279-7 DOI 10.1007/978-3-642-20279-7 Springer Heidelberg Dordrecht London New York Library of Congress Control Number: 2011927926 ACM Computing Classification (1998): H.1, H.4, H.5, J.1, K.4.3, K.6.1 © Springer-Verlag Berlin Heidelberg 2011 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 to prosecution under the German Copyright Law. 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: deblik Printed on acid-free paper Springer is part of Springer Science+Business Media (www.springer.com)
Foreword
When enterprise architects try to explain to people who are not enterprise architects what it is they do for a living, they almost invariably resort to using an analogy with the architecture of buildings, and describe enterprise architecture as a ‘kind of blueprint’. While this analogy may be helpful in conveying a general sense of what the discipline of enterprise architecture is ‘sort of like’, it can be seriously misleading if taken too literally. Despite this risk, far too much thinking about enterprise architecture has been unduly influenced by this analogy. This is not surprising; after all, it is called ‘architecture’, and it is reasonable to expect that if two disciplines share an important part of their name, they must share a lot of other stuff as well. Unfortunately, they do not. Buildings and enterprises are qualitatively different kinds of artifacts. Probably the biggest difference is the way people relate to them. People do not just use or interact with an enterprise: people are the enterprise. Minimizing, if not entirely ignoring, this difference, whether deliberately or inadvertently, makes the problem of enterprise design seem tractable, in that it can be thought of as a matter of drafting the right kind of blueprint. Hence, most d
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