Service-oriented computing provides the right means for building flexible systems that allow dynamic configuration and on-the-fly composition. In order to realize this vision, the system must be able to choose the most suitable service from a large and constantly changing number of providers. The paper presents an approach for selecting services based on a coherent conceptual policy model and a service utility measure. The framework is capable of capturing technical and application specific aspects of services and incorporates them into the decision making process. The authors assist the user in establishing the utility measure from existing policies by attaching value function patterns to the individual attributes.
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