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The Open Group Architecture Framework (TOGAF) is a framework for Enterprise Architecture which provides a comprehensive approach to the design, planning, implementation, and governance of an enterprise information architecture. The architecture is typically modeled at four levels or domains; Business, Application, Data, Technology. A set of foundation architectures are provided to enable the architecture team to envision the current and future state of the architecture.

Contents 1 Architecture and Architecture Framework Defined 2 Enterprise Architecture Domains 3 Architecture Development Method 4 Enterprise Continuum 5 The Open Group 6 Publications 7 Alternative Enterprise Architecture Frameworks 8 External links

The ANSI/IEEE Std 1471-2000 specification of architecture (of software-intensive systems) may be stated as: "the fundamental organization of a system, embodied in its components, their relationships to each other and the environment, and the principles governing its design and evolution."

However TOGAF has its own view, which may be specified as either a "formal description of a system, or a detailed plan of the system at component level to guide its implementation", or as "the structure of components, their interrelationships, and the principles and guidelines governing their design and evolution over time."

An architecture framework is a toolset which can be used for developing a broad range of different architectures. It should:

• describe a methodology for defining an information system in terms of a set of building blocks
• show how the building blocks fit together
• contain a set of tools
• provide a common vocabulary
• include a list of recommended standards
• include a list of compliant products that can be used to implement the building blocks

TOGAF is such an architecture framework.

TOGAF supports four architecture domains:

1. Business (or business process) architecture which defines the business strategy, governance, organisation, and key business processes of the organization
2. Applications architecture which provides a blueprint for the individual application systems to be deployed, the interactions between the application systems, and their relationships to the core business processes of the organization
3. Data architecture which describes the structure of an organization's logical and physical data assets and the associated data management resources
4. Technology architecture which describes the software infrastructure intended to support the deployment of core, mission-critical applications

The Architecture Development Method (ADM) is applied to develop an enterprise architecture which will meet the business and information technology needs of an organization. It may be tailored to the organization's needs and is then employed to manage the execution of architecture planning activities.

The process flow is as follows:

The process is iterative and cyclic. Each step checks with Requirements. Phase C involves some combination of both Data Architecture and Applications Architecture.

Additional clarity can be added between steps B. and C. in order to provide a complete Information Architecture.

Performance Engineering working practices are applied to the Requirements phase, and to the Business Architecture and Information System Architectures phases. Within Information System Architectures, it is applied to both the Data Architecture and Application Architecture.

The image can be found in the TOGAF documentation at: TOGAF 8.1.1 Online

The Enterprise Continuum may be viewed as a "virtual repository" of all the architecture assets available to an organization. These include architectural models, architectural patterns, architecture descriptions, and other artifacts. These artificats may exist within the enterprise and also in the IT industry at large.

The Enterprise Continuum consists of both the Architecture Continuum and the Solutions Continuum. The Architecture Continuum specifies the structuring of reusable architecture assets, and includes rules, representations and relationships of the information system(s) available to the enterprise. The Solutions Continuum describes the implementation of the Architecture Continuum by defining reusable solutions building blocks.

TOGAF has been developed by the Architecture Forum of The Open Group and continuously evolved since the mid-90’s. The latest version is 8.1.1, which is documented in detail in TOGAF 8.1 Enterprise Edition The Forum is currently working on the TOGAF 9, which will be the next version of the three major TOGAF components – Architecture Development Method (ADM), Enterprise Continuum and Resource Base. The following themes have been identified for TOGAF Version 9:

   * The Enterprise, Culture, and Stakeholders
   * Architecture Creation
   * Architecture-based Transformation
   * Architecture Realization
   * Architecture Management and Governance

The Open Group provides TOGAF free of charge to organizations for their own internal noncommercial purposes.

• TOGAF 8.1.1 Enterprise Edition in a book format
• Guide to Security Architecture in TOGAF ADM (white paper on security considerations that need to be addressed in the TOGAF ADM for the guidance of enterprise architects and system designers.)
• TOGAF/MDA Mapping (white paper providing a mapping between two sets of industry standards - the TOGAF Architecture Development Method (ADM) for Enterprise Architecture, developed by The Open Group Architecture Forum; and OMG's Model Driven Architecture (MDA) family of modeling standards.)

• DoDAF
• FEAF
• MODAF
• Zachman framework

• TOGAF 8.1.1 Online
• TOGAF FAQs
• TOGAF Certification program
• Tools for architecture development
• IBM developerWorks: Understand The Open Group Architecture Framework (TOGAF) and IT architecture in today's world (February 2006)
• CIO Magazine: A New Blueprint for the Enterprise - How to Get Started (March 2005)
• Developer.com: TOGAF: Establishing Itself As the Definitive Method for Building Enterprise Architectures in the Commercial World (June 2004)
• TOGAF or not TOGAF: Extending Enterprise Architecture beyond RUP (January 2007)