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IT Enterprise Architecture Management

A Practitioner's Guide to Systematic IT Alignment

This book is 65% completeLast updated on 2026-06-05
Wolfgang Keller and Florian Oelmaier

Software and infrastructure only create value when they pull in the same direction as the business. This book shows IT leaders how to get there: from shaping IT strategy and the architecture roadmap to the daily discipline of IT and architecture governance, all built on a pattern-based approach that adapts to your organization rather than forcing it into a template.

Grounded in established frameworks such as TOGAF, COBIT, and ITIL, it pairs solid fundamentals with numerous real-world examples — and gives growing weight to compliance and IT security, now central concerns of any IT management agenda.

This English edition is based on the German standard work on the subject, fully revised in its 4th edition (late 2024). It is current with TOGAF 10 and reflects recent developments in business-oriented enterprise architecture — including the open-source tool EDGY and patterns for digital strategy — alongside the latest trends in IT risk management and cybersecurity architecture.

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About

About

About the Book

  • A Guide to Establishing Systematic IT Alignment
  • With a focus on practical applicability and numerous real-world examples
  • Up-to-date on TOGAF 10 and prominent topics such as digitalization and cybersecurity architectures

The purpose of IT enterprise architecture is to align a portfolio of software and IT infrastructure in such a way that it delivers optimal value to the organization using it.

This book provides a systematic introduction to the fundamentals, application, and preparation for the practical implementation of IT enterprise architecture. It describes in detail how IT managers can be supported in optimizing a company’s software portfolio to achieve its goals. The scope of tasks ranges from developing the IT strategy and the development plan to the day-to-day work of IT governance and architecture governance.

Key focuses of the book are:

  • Adapting enterprise IT architecture processes to the company’s needs through a pattern-based approach.
  • Relation to common frameworks such as TOGAF, COBIT, or ITIL.
  • Consideration of increasingly important aspects such as compliance and IT security, which account for a growing share of IT management work.

This is the English Translation of German Standard Book on the topic. It is based on the 4th edition, which has been completely revised and updated in late 2024. New developments in the field of business-oriented enterprise architecture, such as the open-source tool EDGY and patterns for digital strategies, have been incorporated, as have technological trends in IT risk management and IT security.

Disclaimer: Translation is Work in Progress - that's why we rate it at 65% of effort at the moment. You will get the full story for a lower price at the moment

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Computer SecurityAPI DesignAPIsSoftware ArchitectureSoftware EngineeringBusiness ArchitectureAgileBusiness and IT AlignmentEnterprise ArchitectureRisk ManagementProject Management

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Author

About the Authors

Wolfgang Keller
Florian Oelmaier

Contents

Table of Contents

Foreword to the English Edition

Disclaimer

Foreword to the 4th German Edition

Foreword to the 3rd German Edition

Foreword to the 2nd German Edition

Foreword to the 1st German Edition

Acknowledgments for the 4th German Edition

1 Introduction and Overview

  1. 1.1 Why This Book
  2. 1.2 Structure of This Book
  3. 1.3 Who Should Read This Book and Why?
  4. 1.4 How Can You Read This Book?
  5. 1.5 What Has Changed Since the First Edition

2 What Is IT Enterprise Architecture?

  1. 2.1 The Noun: Enterprise Architecture as Structure
  2. 2.2 The Activity: Enterprise Architecture as Management
  3. 2.3 A Pattern-Based Approach to IT Enterprise Architecture

3 Target Patterns

  1. 3.1 Business-IT-Alignment
  2. 3.2 Improving Earnings Power and Cost Management
  3. 3.3 Optimization with Sourcing Strategies
  4. 3.4 Improving Time-to-Market
  5. 3.5 Improving Customer Satisfaction
  6. 3.6 Reduction of Heterogeneity
  7. 3.7 Handling Mergers
  8. 3.8 Compliance, Security, and Risk Management

4 Management Process Patterns

  1. 4.1 IT Strategy Development
  2. 4.2 Business-IT-Alignment with Capabilities
  3. 4.3 Management of the Application Portfolio
  4. 4.4 Capturing the As-Is Application Landscape
  5. 4.5 Application Portfolio Analyses
  6. 4.6 Application Landscape, Metrics and Dashboards
  7. 4.7 Strategic Application Landscape Planning
  8. 4.8 Management of a Service Portfolio
  9. 4.9 Managed Evolution
  10. 4.10 Establishing an IT Governance System
  11. 4.11 Architecture Governance
  12. 4.12 SOA Governance
  13. 4.13 Management of Mergers
  14. 4.14 Reduction of Heterogeneity

5 Views and Information Models

  1. 5.1 Software Cartography as the Foundation for Systematization
  2. 5.2 Types of Software Maps
  3. 5.3 Viewpoints and Viewpoint-Patterns
  4. 5.4 Information Models

6 Compliance

  1. 6.1 What Is “Compliance”?
  2. 6.2 IT Compliance in the Context of Enterprise Compliance
  3. 6.3 Representative Compliance Topics for IT
  4. 6.4 KonTraG
  5. 6.5 Retention Periods
  6. 6.6 COBIT and Compliance
  7. 6.7 The Clinger-Cohen Act

7 Cyber Security Architecture

  1. 7.1 Target Patterns
  2. 7.2 Management Process Patterns
  3. 7.3 Solution Patterns at Infrastructure Level
  4. 7.4 Solution Patterns at Application Level
  5. 7.5 Summary

8 IT Risk Management

  1. 8.1 What Is Risk Management?
  2. 8.2 Managing Risks with Total Risk Profiling
  3. 8.3 Risk Register for Applications

9 Macro Architecture Patterns

  1. 9.1 Blueprints and Architecture Guidelines
  2. 9.2 Example: Domain Architecture for Insurance
  3. 9.3 Examples of Technical Architectural Patterns

10 Frameworks for IT Enterprise Architecture

  1. 10.1 A Classification Scheme for EAM and IT Management Frameworks
  2. 10.2 TOGAF 10th Edition
  3. 10.3 The Zachman Framework

11 IT Management Frameworks

  1. 11.1 COBIT
  2. 11.2 ITIL

12 Tools for Enterprise Architecture Management

  1. 12.1 Trade-offs in Tool Selection
  2. 12.2 Scope of an Integrated IT Planning Tool
  3. 12.3 Possible Scope of Planning Tools
  4. 12.4 The Origin of Tools
  5. 12.5 Market Situation

13 Lean and Agile EAM

  1. 13.1 Lean and IT Enterprise Architecture
  2. 13.2 The Activity: Applying Agile Practices to EAM Processes
  3. 13.3 The Noun: Agile Software Architecture

14 Pragmatic Approaches

  1. 14.1 Adequate Budget for IT Enterprise Architecture
  2. 14.2 How Much Order Is Enough?
  3. 14.3 Hazards for Enterprise Architects
  4. 14.4 Working with Solution Architects
  5. 14.5 Tips and Tricks

15 Adoption Paths for IT Enterprise Architecture

  1. 15.1 IT Enterprise Architecture for Large Enterprises
  2. 15.2 Adoption Paths for IT Enterprise Architecture
  3. 15.3 Paths in Corporations with Decentralized IT Units

16 Outlook

  1. And Really, Finally: Nothing Without AI Anymore?!

A Checklist for Guidelines, Feasibility Studies, and Architecture Documents

B Text Extracts

  1. B.1 Excerpt from SOX Sections 302 and 404
  2. B.2 Excerpt from the AO (German Fiscal Code)

C List of Abbreviations

D Glossary

E Bibliography

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