Over the past few decades, the way in which enter- prises have performed their business and organizational changes at the level of information systems has for the most part been incomplete and / or unsystematic. Funda- mental IT innovations have therefore coincided with the development of heterogeneous application landscapes which are more or less inconsistent with the business and / or process architecture. Explicit management of the application architecture, which forms the interface be- tween the business and the technical view on the informa- tion system, is necessary to recreate and preserve consis- tency. Based on a requirements analysis for enterprise application architecture management and a discussion of related work from literature and practice, this paper proposes processes that are based on three case studies. The proposed processes are evaluated in respect of the specified requirements.