1. A method for performing a system analysis of a surveillance system including a plurality of audio and/or video components, said method comprising the steps of: representing selected ones of the plurality of components and relations among the representations of the selected components, providing a mapping between a plurality of observable events and a plurality of causing events occurring in the selected components; and determining at least one likely causing event based on at least one of the plurality of observable events by determining a measure between each of a plurality of values associated with the plurality of observable events and the plurality of causing events.