This chapter discusses in some depth The Open Group Architectural Framework (TOGAF). Currently, it is one of the most often used frameworks by organizations all over the world. TOGAF enables corporate architects and stakeholders to design, evaluate, and build a flexible enterprise architecture for the organization. Any organization undertaking, or planning to undertake, the design and implementation of an enterprise architecture for the support of mission-critical business applications using open systems building blocks can benefit from using TOGAF. Customers who design and implement enterprise architectures using TOGAF are assured of a design, and a procurement specification that facilitates open systems implementation and reduces risk. On the basis of its openness, we believe that in the future this model will become the most often used framework. The topic was briefly introduced in Chapter 2 and is expanded here.