Simple Architectures For Complex Enterprises

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Overview

Dismantle the overwhelming complexity in your IT projects with strategies and real-world examples from a leading expert on enterprise architecture. This guide describes best practices for creating an efficient IT organization that consistently delivers on time, on budget, and in line with business needs.

IT systems have become too complex—and too expensive. Complexity can create delays, cost overruns, and outcomes that do not meet business requirements. The resulting losses can ...

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Simple Architectures for Complex Enterprises

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Overview

Dismantle the overwhelming complexity in your IT projects with strategies and real-world examples from a leading expert on enterprise architecture. This guide describes best practices for creating an efficient IT organization that consistently delivers on time, on budget, and in line with business needs.

IT systems have become too complex—and too expensive. Complexity can create delays, cost overruns, and outcomes that do not meet business requirements. The resulting losses can impact your entire company. This guide demonstrates that, contrary to popular belief, complex problems demand simple solutions. The author believes that 50 percent of the complexity of a typical IT project can and should be eliminated—and he shows you how to do it.

You’ll learn a model for understanding complexity, the three tenets of complexity control, and how to apply specific techniques such as checking architectures for validity. Find out how the author’s methodology could have saved a real-world IT project that went off track, and ways to implement his solutions in a variety of situations.

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Product Details

  • ISBN-13: 9780735625785
  • Publisher: Microsoft Press
  • Publication date: 5/14/2008
  • Series: Best Practices (Microsoft) Ser.
  • Pages: 210
  • Sales rank: 1,501,267
  • Product dimensions: 7.30 (w) x 8.90 (h) x 0.70 (d)

Meet the Author

Roger Sessions is a recognized expert in enterprise architecture. He serves on the Board of Directors of the International Association of Software Architects (IASA), is Editor-in-Chief of IASA's Perspectives Journal, and is a Microsoft MVP in enterprise architecture. He has written six books, including Software Fortresses: Modeling Enterprise Architectures, and many articles. He has been a keynote speaker on the topic of enterprise architecture for dozens of events in more than 30 countries. He is the Chief Technology Officer of ObjectWatch.

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Table of Contents

Dedication;
Acknowledgments;
Legal Notices;
Introduction;
The Organization of This Book;
Find Additional Content Online;
Support for This Book;
The Question of Complexity;
Chapter 1: Enterprise Architecture Today;
1.1 Why Bother?;
1.2 Common Definitions;
1.3 What Is Enterprise Architecture?;
1.4 Complexity in Enterprise Architectures;
1.5 The Zachman Framework for Enterprise Architectures;
1.6 The Open Group Architecture Framework;
1.7 Federal Enterprise Architecture;
1.8 Summary;
Chapter 2: A First Look at Complexity;
2.1 Partitioning;
2.2 Five Laws of Partitions;
2.3 Simplification;
2.4 Iteration;
2.5 Summary;
Chapter 3: Mathematics of Complexity;
3.1 Looking at Complexity;
3.2 Laws of Complexity;
3.3 Homomorphisms;
3.4 Controlling Complexity in Dice Systems;
3.5 Adding Buckets;
3.6 Partitioning;
3.7 Equivalence Relations;
3.8 Equivalence Classes;
3.9 Inverse Equivalence Relations;
3.10 Equivalence Relations and Enterprise Architectures;
3.11 Synergistic in Practice;
3.12 Removing Faces;
3.13 Removing Buckets;
3.14 Other Measures of Complexity;
3.15 Complexity in Theory and in Practice;
3.16 Summary;
The Quest for Simplification;
Chapter 4: The ABCs of Enterprise Partitions;
4.1 Review of the Mathematics;
4.2 Partitioning the Enterprise;
4.3 The ABCs of Enterprise Equivalence Classes;
4.4 ABC-Type Relationships;
4.5 Implementations and Deployments;
4.6 ABC Types;
4.7 Type Hierarchies;
4.8 Composition Relationships;
4.9 Partner Relationships;
4.10 Relationships and Partition Simplification;
4.11 Retail Operation, Again;
4.12 Summary;
Chapter 5: SIP Process;
5.1 Overview;
5.2 Phase 0: Enterprise Architecture Evaluation;
5.3 Contraindications;
5.4 Phase 1: SIP Preparation;
5.5 Phase 2: Partitioning;
5.6 Phase 3: Partition Simplification;
5.7 Phase 4: ABC Prioritization;
5.8 Phase 5: ABC Iteration;
5.9 Summary;
Chapter 6: A Case Study in Complexity;
6.1 Overview of NPfIT;
6.2 Current Status of NPfIT;
6.3 The SIP Approach;
6.4 Summary;
Chapter 7: Guarding the Boundaries: Software Fortresses;
7.1 Technical Partitions;
7.2 Rule 1: Autonomy;
7.3 Rule 2: Explicit Boundaries;
7.4 Rule 3: Partitioning of Functionality;
7.5 Rule 4: Dependencies Defined by Policy;
7.6 Rule 5: Asynchronicity;
7.7 Rule 6: Partitioning of Data;
7.8 Rule 7: No Cross-Fortress Transactions;
7.9 Rule 8: Single-Point Security;
7.10 Rule 9: Inside Trust;
7.11 Rule 10: Keep It Simple;
7.12 Summary;
Chapter 8: The Path Forward;
8.1 Complexity: The Real Enemy;
8.2 Simplicity Pays;
8.3 A Philosophy of Simplicity;
8.4 A Review of the Book Content;
8.5 A Parting Message;
This Book at a Glance;
Mathematical Concepts;
Enterprise Architectural Concepts;
SIP Concepts;
Author Biography;
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  • Anonymous

    Posted February 23, 2009

    Great resource for Software Architecture

    This resource is a very good option to utilize when deciding which architecture to leverage on a given software system. Many books will attempt to advise what should be used within specific languages like Java, C++, or C#. Regardless of the language used in a software system, it is gravely important to understand and use sound, simple architecture when building scalable, dependable, and cost effective application systems which perform complex work.

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