Johan Ullberg

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Enterprise architecture models can be used in order to increase the general understanding of enterprise systems and specifically to perform various kinds of analysis. It is generally understood that such modeling encompasses general scientific issues, but the monetary aspects of the modeling of software systems and their environment are not equally well(More)
In the design phase of business and software system development, it is desirable to predict the properties of the system-to-be. Existing prediction systems do, however, not allow the modeler to express uncertainty with respect to the design of the considered system. In this paper, we propose a formalism, the Predictive, Probabilistic Architecture Modeling(More)
The discipline of enterprise architecture advocates the use of models to support decision-making on enterprise-wide information system issues. In order to provide such support, enterprise architecture models should be amenable to analyses of various properties, as e.g. the availability, performance, interoperability, modifiability, and information security(More)
Enterprise architecture advocates for model-based decisionmaking on enterprise-wide information system issues. In order to provide decision-making support, enterprise architecture models should not only be descriptive but also enable analysis. This paper presents a software tool, currently under development, for the evaluation of enterprise architecture(More)
Modern enterprises face the challenge to survive in an ever changing environment. One commonly accepted means to address this challenge and further enhance survivability is enterprise architecture (EA) management, which provides a holistic model-based approach to business/IT alignment. Thereby, the decisions taken in the context of EA management are based(More)
What constitutes an enterprise architecture framework is a contested subject. The contents of present enterprise architecture frameworks thus differ substantially. This paper aims to alleviate the confusion regarding which framework contains what by proposing a meta framework for enterprise architecture frameworks. By using this meta framework, decision(More)
Enterprise Architecture (EA) management involves tasks that substantially contribute to the operations of an enterprise, and to its sustainable market presence. One important aspect of this is the availability of services to customers. However, the increasing interconnectedness of systems with other systems and with business processes makes it difficult to(More)
Good IT decision making is a highly desirable property that can be furthered by the use of enterprise architecture, an approach to IT management using diagrammatic models. In order to support decision making, the models must be amenable to various kinds of analysis. It is desirable that the models support the sought after analysis effectively since creation(More)
Interoperability, defined as the satisfaction of a communication need between two or more actors, is a sought after quality for enterprises in today’s competitive environment. For a decision maker, understanding the effects of a changing market place and understanding how to adapt to the new environment is essential. Sustainable interoperability is an(More)