The invention provides a method for determining the impact of a failure of a component on one or more services that the component is supporting. The method receiving a data feed from a processing node, the data feed containing data indicative of the identity and system status of a component running on the processing node; in response to the identity of the component, first determining if the component supports one or more services; identifying the temporal activity of the one or more services and, in dependence on the determining step, second determining the impact of the system status on the one or more services.