Complex Enterprise Architecture (eBook)

A New Adaptive Systems Approach

John D. McDowall (Autor)

eBook Download: PDF

2019 | First Edition
XV, 155 Seiten
Apress (Verlag)
978-1-4842-4306-0 (ISBN)

Infos

Implement successful and cost-effective enterprise architecture projects. This book provides a new approach to developing enterprise architecture based on the idea of emergent behaviors-where instead of micromanaging system implementation, the enterprise architecture effort establishes clear goals and leaves the details to the implementation teams. System development efforts are measured based on their contribution to achieving business goals instead of implementing specific (possibly outdated) requirements.

Most enterprise architecture initiatives employ one of the existing system architecture frameworks such as Zachman or The Open Group Architecture Framework, but these are not well-suited for enterprise architecture in a modern, agile organization. The new approach presented in this book is based on the author's experience with large enterprise architecture efforts. The approach leverages research into complex adaptive systems and emergent behaviors, where a few simple rules result in complex and efficient enterprise behaviors.

Simplifying the task of establishing and maintaining the enterprise architecture cuts the costs of building and maintaining the architecture and frees up those resources for more productive pursuits. System implementers are given the freedom to rapidly adapt to changing user needs without the blessing of the enterprise modeling priesthood, and the architecture is transformed from a static pile of obscure models and documents into an operational framework that can be actively used to manage an enterprise's resources to better achieve business goals. The enterprise architect is free to stop focusing on building and maintaining models and start focusing on achieving business goals.

 

What You'll Learn

• Refocus enterprise architecture on business needs by eliminating most of the enterprise-level models
  
• Delegate tasks to the development teams who do system implementation
  
• Document business goals, establish strategies for achieving those goals, and measure progress toward those goals
  
• Measure the results and gauge whether the enterprise architecture is achieving its goals
  
• Utilize appropriate modeling techniques that can be effectively used in an enterprise architecture

Who This Book Is For

Architecture practitioners and architecture managers: Practitioners are experienced architects who have used existing frameworks such as Zachman, and have experience with formal architecture modeling and/or model-based system engineering; managers are responsible for managing an enterprise architecture project and either have experience with enterprise architecture projects that were ineffective or are looking for a different approach that will be more cost-effective and allow for more organizational agility. Government program managers looking for a different approach to make enterprise architecture more relevant and easier to implement will also find this book of value.

John D. McDowall is a specialist in the architecture, design, integration, and testing of enterprise information and data analysis systems. He also conducts independent research in the fields of architecture and system engineering. John has over 20 years of experience, including his current position as the lead architect for a major system-of-systems effort within the US Department of Defense. Over the years he has learned what does and does not work, and he has developed the approach in this book as a result of the lessons he has learned solving real-world problems. He thinks it will be applicable to many other enterprise architecture efforts.

After graduating from the US Naval Academy, John spent 11 years on active duty in the Marine Corps in a variety of positions. Since leaving active duty he has worked as a contractor doing IT systems development and integration for a variety of projects in the logistics, command and control (C2), and intelligence communities. During this time he completed his PhD in Information Systems. In addition to his full-time job he is an adjunct professor in the Computer Science Department at George Mason University.

Inhalt

Table of Contents 5
About the Author 9
About the Technical Reviewer 10
Acknowledgments 11
Introduction 12
Chapter 1: Enterprise Architecture in Practice 13
Enterprise Architecture Is Broken 13
Origins of Architecture Frameworks 15
Rethinking Enterprise Architecture 19
Enabling Agility 20
Guiding the Enterprise 21
Relation to System Architectures 23
Summary 24
Chapter 2: An Overview of Complex Adaptive Systems 25
Complex Adaptive Systems 25
Examples of Complex Adaptive Systems 26
Sugarscape 28
Economics and Enterprise Architecture 30
Adaptive Systems and Enterprise Architecture 32
Focus on Goals 33
Rules and Constraints 35
Rules 36
Constraints 39
Harnessing Emergent Behaviors 42
Summary 45
Chapter 3: Overview of the Enterprise Architecture Framework 47
About Models 48
A Simple Example 49
Deciding What to Model 50
Primary Objects 53
Goals 53
Enterprise Goals 54
Architecture Goals 55
Strategies 56
Actors 57
Processes 58
Data 59
Secondary Objects 61
Systems 61
Behaviors 62
Environment 64
Standards 65
Summary 67
Chapter 4: Primary Objects 69
Goals 70
Enterprise Goals 71
Architecture Goals 73
Strategies 76
Processes 78
Process Example 79
Required Processes 82
Actors 84
Data 85
Syntax and Semantics 86
Modeling Data 87
Tuple Data 88
Object Data 89
Summary 90
Chapter 5: Secondary Objects 92
Behaviors 93
Capturing Behaviors 95
Documenting Behaviors 97
Environment 99
Infrastructure Environment 100
Organizational Environment 102
System Environment 103
Systems 104
Monolithic Systems 105
Component Systems 106
Standards 108
De Jure Standards 109
De Facto Standards 110
Summary 111
Chapter 6: Modeling the Enterprise Architecture 114
Dynamic Enterprise Architecture 115
Bounding by Detail 116
Defining the Enterprise 117
Reference Architecture 118
Solution Architecture 119
Bounding by Time 120
As-Is Architecture 121
To-Be Architecture 122
Creating Models 123
Modeling Languages 125
Unified Modeling Language 126
Systems Modeling Language 127
Business Process Model and Notation 128
Web Ontology Language 129
Modeling Tools 130
Model Sizing 131
Change Control 133
Summary 134
Chapter 7: Measuring Effects 137
Testing 140
Test-Driven Development 140
Operational Testing 142
Continuous Monitoring 144
Portfolio Management 146
Policy Compliance 148
Enterprise Capability 149
Data Flows 151
Reporting 153
Summary 154
Appendix A: References 157
Enterprise Architecture Frameworks 157
Enterprise Architecture Practice 157
Modeling Languages 158
Complex Systems/Emergent Behaviors 158
Miscellaneous 159
Index 160

Produkt-Details

• Erscheint lt. Verlag: 7.2.2019
• Zusatzinfo: XV, 155 p. 6 illus.
• Verlagsort: Berkeley
• Sprache: englisch
• Themenwelt: Mathematik / Informatik ► Informatik ► Netzwerke
• Schlagworte: Agile architecture • Architecture • Architecture Framework • Complex Adaptive Systems • emergent behavior • Enterprise Architecture • MBSE • Model-Based System Engineering • Model-Driven Architecture • Operational architecture • System Architecture • system development
• ISBN-10: 1-4842-4306-4 / 1484243064
• ISBN-13: 978-1-4842-4306-0 / 9781484243060