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- Arquitecturas dos sistemas de informação: uma comparação de abordagensPublication . Rodrigues, Luís Silva; Amaral, LuisMais de duas décadas após a sua introdução nos Sistemas de Informação (SI) continua a ser relevante falar e aplicar as arquitecturas dos SI nas organizações. A este facto não é alheio o reconhecimento da importância e criticidade das arquitecturas dos SI para o sucesso dos Sistemas e Tecnologias de Informação (SI/TI) nas organizações. Neste contexto, este artigo para além de reflectir sobre os tipos de arquitecturas nos SI, sua aplicabilidade e utilidade para as organizações, pretende fazer uma comparação entre as principais abordagens para a construção das arquitecturas dos SI.
- Value trees usefulness in assessment of enterprise architectures valuePublication . Rodrigues, Luis Silva; Amaral, LuisIn last two decades a significant number of organizations began to build Enterprise Architectures in order to deal with complexity and change, to align business and IT, to cut costs and several other objectives. The current economic pressures and the significant investment that Enterprise Architectures represents are increasingly demanding an assessment and demonstration of their usefulness and value. Despite the need and interest there still is no consensus on how to demonstrate the value. Some value models and methods have already been presented but they are still not detailed enough to be used and require further research to be useful for most organizations. In this paper, we present an initial discussion about the usefulness of value drivers and value trees as a way to measure the Enterprise Architectures value.
- Key dimensions of the enterprise architecture value drivers: time frame and quantificationPublication . Rodrigues, Luis Silva; Amaral, LuisOne of biggest issues that the managers of the Enterprise Architecture projects are facing is to justify the investments made in its construction and maintenance. Assessing the value of Enterprise Architectures is an increasingly important issue, however, it is not an easy task. Firstly, it is widely accepted that is very difficult for the organizations to identify the key value drivers. In addition, there are two dimensions of the value drivers that strongly influence the assessment of the Enterprise Architectures value: the time needed to realize the value drivers (time frame dimension) and the quantification of the value driver impact in the organization (quantification dimension). In this short paper is presented an initial discussion about the importance of these two dimensions in the assessment of Enterprise Architecture value.
- Stakeholder perspectives on time horizon and quantification of enterprise architectures benefits/value driversPublication . Rodrigues, Luis Silva; Amaral, LuisEnterprise Architectures are being used by many organizations as a strategic tool for framing and managing key business and IT initiatives and activities. However, given the complexity and costs associated with building an Enterprise Architecture, there is a growing need to demonstrate the importance and usefulness in terms of the value that it represents to an organization. Without an adequate justification for the investment in Enterprise Architecture projects, organizations either do not to start or tend to abandon their Enterprise Architectures. In this paper, we present the stakeholders perspectives on two key dimensions of the Enterprise Architectures benefits/value drivers: the time horizon (time needed for the realization of the benefits) and its quantification (measurement of the realization of the benefits). In our view, these two dimensions are fundamental to realize how much effort will be required to assess the value of an Enterprise Architecture.
- Multidimensional value of enterprise architecturesPublication . Rodrigues, Luis Silva; Amaral, LuisThe increasing complexity of organizations and the environment around them are increasingly demanding for a better and deeper knowledge about how to organize and use IT in order to fulfil the organizations mission, strategies and goals. In the past two decades, in order to obtain a description of the current IT and business state and/or to establish the desired future state, a significant number of organizations began to build Enterprise Architectures. Despite the efforts done, the resources spent and the benefits expected practitioners and researchers recognize that it is still difficult for organizations to assess and measure the Enterprise Architecture value, given the process complexity and the nature of some value factors. In this paper a multidimensional value approach is presented, that considers four value dimensions in Enterprise Architectures value analysis: strategic value, operational value, user value and economic/financial value.
- Key enterprise architecture value drivers: results of a Delphi StudyPublication . Rodrigues, Luis Silva; Amaral, LuisThe value of Enterprise Architectures is undoubtedly an issue that is of particular importance in organizations. In the current context of strong economic constraints and the need to justify the usefulness and investments on Enterprise Architectures are increasingly demanding an assessment and demonstration of its value. However, it is recognized that assessing and demonstrating the value of Enterprise Architecture is not an easy task. In our view, the lack of a clear understanding on what is important for Enterprise Architecture value assessment, the intangible nature of some benefits and the need to quickly demonstrate the Enterprise Architecture value are some of the main reasons for this difficulty. This article presents the results of an international Delphi study involving 63 experts which main objective was to identify, systemize and prioritize the key value drivers of the Enterprise Architecture.