The ADM method constitutes the heart of the TOGAF document, as an enterprise architecture transformation method. This chapter describes how it functions and explains the different phases involved and the relationships between them. It also covers the iterative approach of the method, which should be understood as a guide that can be adapted according to the reality of a given situation. This chapter also looks at best practices associated with the ADM method, which are described in part III of the TOGAF document. The ADM method itself is described in part II.