四种主流企业架构的对比分析

Summary: Twenty years ago, a new field wasborn that soon came to be known as enterprise architecture.This paper covers a broad introduction to the field of enterprise architecture.Although the history of the field goes back 20 years, the field is stillevolving—and rapidly so. (36 printed pages)

·          Contents

Executive Summary
Introduction
A Brief History of EnterpriseArchitecture
Case Study
The Zachman Framework for EnterpriseArchitectures
The Open Group Architecture Framework(TOGAF)
Federal Enterprise Architecture (FEA)
Gartner
Comparison
Conclusion
Glossary
References

·          ExecutiveSummary

Twenty years ago, a new field was born that soon came tobe known as enterprise architecture. The fieldinitially began to address two problems:

• System complexity—Organizations were spending more and more money     building IT systems; and
• Poor business alignment—Organizations were     finding it more and more difficult to keep those increasingly expensive IT     systems aligned with business need.
  

The bottom line: more cost, less value. These problems,first recognized 20 years ago, have today reached a crisis point. The cost andcomplexity of IT systems have exponentially increased, while the chances ofderiving real value from those systems have dramatically decreased.

Today's bottom line: even more cost, even less value.Large organizations can no longer afford to ignore these problems. The field ofenterprise architecture that 20 years ago seemed quaintly quixotic today seemspowerfully prophetic.

Many enterprise-architectural methodologies have comeand gone in the last 20 years. At this point, perhaps 90 percent of the fielduse one of these four methodologies:

.......