Murer / Bonati Managed Evolution

A Strategy for Very Large Information Systems
1. Auflage 2010
ISBN: 978-3-642-01633-2
Verlag: Springer
Format: PDF
Kopierschutz: Adobe DRM (»Systemvoraussetzungen)

E-Book, Englisch, 264 Seiten

Many organizations critically depend on very large information systems. In the authors' experience these organizations often struggle to find the right strategy to sustainably develop their systems. Based on their own experience at a major bank, over more than a decade, the authors have developed a successful strategy to deal with these challenges, including: - A thorough analysis of the challenges associated with very large information systems - An assessment of possible strategies for the development of these systems, resulting in managed evolution as the preferred strategy - Describing key system aspects for the success of managed evolution, such as architecture management, integration architecture and infrastructure - Developing the necessary organizational, cultural, governance and controlling mechanisms for successful execution

Autoren/Hrsg.

Murer, Stephan

Bonati, Bruno

Inhaltsverzeichnis

1;Foreword;6
2;Preface;8
2.1;Context;8
2.2;Challenge;9
2.3;The Message in This Book;9
2.4;Side-Stories;10
2.5;Intended Audience;10
2.6;Structure of the Book;11
3;Acknowledgments;12
4;About the Authors;14
5;Contents;16
6;List of Figures;20
7;List of Tables;22
8;List of Side Stories;24
9;Part I: Structure, Properties, Challenges and Architecture of Very Large Information Systems;26
9.1;Chapter 1: Very Large Information System Challenge;27
9.1.1;1.1 Background;27
9.1.2;1.2 Complexity of Very Large Information Systems;29
9.1.3;1.3 Properties of Very Large Information Systems;33
9.1.4;1.4 Strategic Approaches for Very Large Information Systems;38
9.1.4.1;1.4.1 Opportunistic Approach;41
9.1.4.2;1.4.2 Replacement Approach;43
9.1.4.3;1.4.3 Greenfield Approach;46
9.1.5;1.5 The Core Idea of Managed Evolution;47
9.1.6;1.6 Elements of Managed Evolution;54
9.1.7;1.7 Where to Start with Managed Evolution;56
9.2;Chapter 2: Architecture Management;59
9.2.1;2.1 What is IT Architecture and Why Is It Important to Managed Evolution;59
9.2.2;2.2 Architecture Principles;61
9.2.3;2.3 Architecture Layers and Models;63
9.2.4;2.4 Business Architecture;66
9.2.5;2.5 Application Architecture;69
9.2.6;2.6 Technical Architecture;81
9.2.7;2.7 Vertical Architectures;84
9.2.8;2.8 Architecture as an Activity: The Architecture Process;89
9.2.9;2.9 Architecture Organization: Federated Architecture Process;95
9.3;Chapter 3: Integration Architecture;102
9.3.1;3.1 Enabling Managed Evolution;102
9.3.2;3.2 Challenges for Integration Architecture;104
9.3.3;3.3 Composing Systems from Components;106
9.3.3.1;3.3.1 Functional Composition;107
9.3.3.2;3.3.2 Desktop Integration;108
9.3.3.3;3.3.3 Process Orchestration;109
9.3.3.4;3.3.4 Layering Components;109
9.3.4;3.4 Choosing the Right Interfaces;114
9.3.4.1;3.4.1 Adequate Degree of Coupling;115
9.3.4.2;3.4.2 Adequate Integration Scope;117
9.3.4.3;3.4.3 Avoid Redundancy;118
9.3.4.4;3.4.4 Formal Syntax and Rich Semantics;119
9.3.4.5;3.4.5 Adequate Granularity and Reuse;122
9.3.4.6;3.4.6 Bridging Technical Heterogeneity and Network Distance;123
9.3.4.7;3.4.7 Use Industry Standards Where Applicable;124
9.3.5;3.5 Interfaces and Service Contracts;125
9.3.5.1;3.5.1 Interfaces and Services;126
9.3.5.2;3.5.2 Non-Functional Properties of Services;129
9.3.5.3;3.5.3 Contracts as Active Relationships;130
9.3.5.4;3.5.4 Service Versioning;132
9.3.6;3.6 Service Management Process;134
9.3.7;3.7 Service Delivery Infrastructure;139
9.3.8;3.8 Consuming Foreign Services;142
9.3.9;3.9 Evolutionary Decomposition of Monolithic Systems;147
9.4;Chapter 4: Infrastructure;152
9.4.1;4.1 Managed Evolution of Infrastructure;152
9.4.2;4.2 Technology Portfolio;154
9.4.3;4.3 Platforms;161
9.4.3.1;4.3.1 Platform Concept;161
9.4.3.2;4.3.2 Platforms as Infrastructure Service Providers;162
9.4.3.3;4.3.3 Application Development Support Processes;164
9.4.3.4;4.3.4 Platforms Operation Processes;165
9.4.3.5;4.3.5 Platform Management Processes;169
9.4.3.6;4.3.6 Application Platforms and Runtime Platforms;171
9.4.4;4.4 Operations;175
9.4.4.1;4.4.1 Operational Challenge of Managed Evolution;176
9.4.4.2;4.4.2 Componentization for Operations;176
9.4.4.3;4.4.3 Autonomic Computing;178
9.4.4.4;4.4.4 Configuration Management Database;181
10;Part II: Organization and Management Processes for the Execution of Managed Evolution;183
10.1;Chapter 5: Business-IT Alignment;184
10.1.1;5.1 Managed Evolution and Business-IT Alignment;184
10.1.2;5.2 Limitations of Hierarchical IT Governance;188
10.1.3;5.3 Matching Roles: Balance of Power;189
10.1.4;5.4 Governance Models for Project Portfolio Management;194
10.1.5;5.5 Business-IT Alignment Processes;199
10.1.5.1;5.5.1 Strategic Business-IT Alignment Process;199
10.1.5.2;5.5.2 Project Portfolio Management Process;204
10.1.5.3;5.5.3 Project Management Process;206
10.2;Chapter 6: People, Culture and Organization;208
10.2.1;6.1 People and Skills;208
10.2.2;6.2 Culture and Values;213
10.2.3;6.3 IT Organization;217
10.2.3.1;6.3.1 IT Organization Embedding;217
10.2.3.2;6.3.2 Interaction of IT Functions;219
10.2.3.3;6.3.3 Strengthening System-Wide Consistency Through Organization;222
10.2.3.4;6.3.4 Checks and Balances;223
10.3;Chapter 7: Measuring the Managed Evolution;224
10.3.1;7.1 Introduction;224
10.3.2;7.2 Measuring Change Drivers and Enablers;226
10.3.3;7.3 Measuring System Properties;231
10.3.4;7.4 Measuring Managed Evolution Strategy;237
10.3.5;7.5 Impact Factors on Agility;245
11;Part III: Summary, Conclusions and Outlook;248
11.1;Chapter 8: Conclusions and Outlook;249
11.1.1;8.1 Summary of Key Points;249
11.1.2;8.2 Outlook;252
12;References;255
13;Glossary;267
14;Abbreviations;276
15;Index;278