1. Introduction
Today's organizations face increasing challenges in managing their IT architecture and landscape as industries are rapidly changing in a global market. As modern business rely on their IT infrastructure for daily operations, the optimal alignment of business and IT has become important. Enterprise Architecture (EA) is a comprehensive approach, which uses models to assist in management and decision-making [1]. Such EA models allow for management of even complex architectures. Over the past two decades EA has become an established approach which is successfully used by many organizations [2].