Requirements and principles deal with determining the business drivers and guiding principles that help in the development of the enterprise architecture. Each functional and non-functional requirement should be traceable to one or more business drivers. Organizations are beginning to become more aware of the need for capturing and managing requirements. Use-case modeling is one of the techniques that is used for doing this. Enterprise Integration, according Brosey et al. (2001), "aims to connect and combines people, processes, systems, and technologies to ensure that the right people and the right processes have the right information and the right resources at the right time".[3]
Enterprise Integration is focused on optimizing operations in a world which could be considered full of continuous and largely unpredictable change. Changes occur in single manufacturing companies just as well as in an "everchanging set of extended or virtual enterprises". It enables the actors to make "quick and accurate decisions and adaptation of operations to respond to emerging threats and opportunities".[3]