Complexity in Information Systems Development by unknow

Author:unknow
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

5 Network of IT Systems as EA Context

The stakeholders presented in Fig. 2 belong to certain business units, which dispose certain business information systems. These systems constitute an environment that should be respected in the EA development process. There is an opportunity to apply system context approach to emphasize the value of stakeholder systems. According to Mitra, system context documents how the IT system, which belongs to the analysed enterprise and which is typically represented as a black box, interacts with external entities, i.e., systems of competitors, suppliers, customers, and government agencies [15]. Analysis of the context of other network systems allows to clarify, confirm, and capture the environment, in which the system has to operate. The nature of the external systems, their interfaces, and the information and control flows are inputs to the downstream specification of the technical artefacts in the EA [15]. The System Context provides a catalogue of systems that are external to the system under consideration, the information flow with the external systems, the external events that the Technology System users need to be aware of or respond to, along with a catalogue of profiles of different types of user roles that will be accessing and interacting with the Information System to harness its capabilities [15].

Therefore, business architecture can be defined as the set of structures and stories that underpin “the business of business”. However, in each case, the relations among business systems are different, so they are discussed as follows:No interaction, e.g., a certain anarchy, because the business organization is centred in itself, without external context.

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