1. A method of determining, from recorded information relating to events occurring during execution of a process, a plurality of the events that are causally connected by scenario causality and precedence causality, the method comprising the steps of: (a) translating the recorded information relating to the events to statements in a first scenario graph language; (b) determining from the first graph language statements, information relating to execution flow of the process wherein each first graph language statement comprises information relating to a predetermined execution flow of the process; and, (c) based on the information relating to an execution flow of the process, determining, for a first plurality of events, events that precede each event from the first plurality of the events that are causally connected by scenario causality to said event from the first plurality of the events.