A general QoS error detection and diagnosis framework for accountable SOA

Accountability is a composite measure for different but related quality aspects. To be able to ensure accountability in practice, it is required to define specific quality attributes of accountability, and metrics for each quality attribute. In this paper, we propose a quality detection and diagnosis framework for the service accountability. We first identify types of quality attributes which are essential to manage QoS in accountability framework. We then present a detection and diagnosis model for problematic situations in services system. In this model, we design SituationLink representing dependencies among quality attributes, and provide information to detect and diagnose problems and their root causes. Based on the model, we propose an integrated model-based and case-based diagnosis method using the SituationLink.