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Creating a specific enterprise architecture is considered as a transition from a general architecture to a specialized one. The architecture development methodology in TOGAF model is the process of making such a transition. The most generalized architectures in TOGAF model are called fundamental architectures. These principles of architecture can theoretically be used by nearly any IT organization in the world.

The next TOGAF specialization level is called system-wide architectures. These principles can be traced in many, but not all types of enterprises. The next one is an industry level of architecture. These principles are specific for enterprises engaged in one area of activity. The final level is the organization architecture level. This is the highest TOGAF specialization level. These are architecture of specific enterprises.

TOGAF includes two main components:

• Architecture Development Method defining the process of architecture development

• Foundation Architecture supplemented with a corresponding resource database, including descriptions of architectural principles, examples of implementation, as well as ADML.

TOGAF description includes seven (7) parts:

• Introduction contains a high-level description of the key concepts of the Architecture in general and TOGAF in particular.

• Architecture Development Method (ADM) is key TOGAF part, describing the step-by-step methodology for developing the Enterprise Architecture.

• ADM Guidelines and Techniques includes a description of the rules and techniques used in TOGAF ADM.

• Architecture Content Framework describes the approach to describe the Enterprise Architecture and contains meta-model of architectural artifacts, structure and description of typical architectural artifacts.

• Enterprise Continuum & Tools addresses the approach to architecture repository of architectural activities results.

• TOGAF Reference Models describes the reference models that to use in projects.

• Architecture Capability Framework approaches the organization of architectural practice in the company i.e. structure, processes, roles, skills and authorities required.

As the main processes of building Enterprise Architecture, it is important to implement only four key processes:

• Creation and development of Enterprise Architecture;

• Management of change;

• Monitoring the implementation of architectural solutions;

• Practice management.