University of Twente Student Theses


Get ready for the cloud: tailoring enterprise architecture for cloud ecosystems

Tritsiniotis, Emmanouil D. (2013) Get ready for the cloud: tailoring enterprise architecture for cloud ecosystems.

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Abstract:Enterprise Architecture describes a high-level design of the structure of the organization, the roles, the processes and the functions, IT systems and IT infrastructure as well as their interrelationships, in order to realize the business goals and objectives. For a robust and coherent Enterprise Architecture it is necessary to use an EA framework. An EA framework is a set of structures for developing Enterprise Architectures. The EA frameworks contain guidelines, tools, common vocabulary and a method for designing the target state of the organization in terms of building blocks. Furthermore, they include a list of recommended standards and compliant products that can be used to implement the building blocks. Nowadays the Cloud Computing paradigm motivates many organizations to adopt and use Cloud services in order to take advantage of the Cloud inherent characteristics. However there are many challenges and risks that Cloud Computing brings to the consumer organizations by extending significantly their traditional IT landscape and boundaries. Cloud transforms the business goals, operations, service offerings, processes, partnerships, and IT infrastructure, things which need to be addressed in the Enterprise Architecture. As a result Enterprise Architects’ community needs to quickly understand the direct and indirect effects of the Cloud to EA. Despite the necessity of a Cloud-enabled EA framework there is not such a thing yet developed. In this report we propose an EA framework for developing, managing and governing enterprise Cloud Ecosystems. The resulting approach is based on TOGAF (EA framework) and ArchiMate (EA modeling language) because they are the most popular EA approaches, applicable to Cloud Computing. The resulting approach is called TOGAF for Cloud Ecosystems and is a Cloud-enabled version of TOGAF. The most important elements of the TOGAF for Cloud Ecosystems approach are two reference models and specific guidelines for every Phase of the ADM on how to develop, manage and govern enterprise Cloud Ecosystems with the use of these reference models. The Cloud Ecosystem Reference Model provides taxonomy of Architecture Building Blocks(ABBs), organizational roles, services and their relationships in the Cloud Ecosystem. This reference model forms a common language to achieve integrity of the architectural descriptions and also it is the base to create architectural viewpoints and diagrams of the enterprise Cloud Ecosystem. By utilizing these ABBs, candidates Cloud services are identified for the enterprise Cloud Ecosystem. The Enterprise Ecosystem Model contains the relationships and dependencies between the different kinds of enterprise frameworks in order to manage the life cycle of these Cloud services. Next to them Cloud-specific guidelines are given for TOGAF ADM, which focus on the Cloud-enabled approach, steps and deliverables of each ADM Phase. The TOGAF for Cloud Ecosystems approach is demonstrated in the context of the ArchiSurance case study in order to provide information on how to develop, manage and govern an enterprise Cloud Ecosystem with the Cloud Ecosystem Reference Model and Enterprise Ecosystem Model. ArchiMate is used to model the deliverables of every ADM Phase for the ArchiSurance CRM Cloud migration scenario. Lastly the resulting approach is evaluated by interviewing three experts in the field of Cloud Computing and Enterprise Architecture, from one (1) Dutch and two (2) U.S. multinational companies. The feedback from the interviews is applied to the TOGAF for Cloud Ecosystems approach.
Item Type:Essay (Master)
Faculty:BMS: Behavioural, Management and Social Sciences
Subject:85 business administration, organizational science
Programme:Business Information Technology MSc (60025)
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