The Open Group Architecture Framework (TOGAF) is a framework for enterprise architecture that provides an approach for designing, planning, implementing, and governing an enterprise information technology architecture. TOGAF is a high level approach to design. 

It is typically modeled at four levels: Business, Application, Data, and Technology. It relies heavily on modularization, standardization, and existing, proven technologies and products.

The Open Group reports that TOGAF is employed by 80% of Global 50 companies and 60% of Fortune 500 companies.