3. The management system of claim 2 , wherein the event instance includes a creation of the one or more events, a closure of the one or more events, or an absence of the one or more events where a pattern of appearance has been established.
2. The management system of claim 1 , wherein the causal relationship detector includes: a graph generator configured to generate one or more graphs based on the events, each graph including the vertices and the arcs connecting the temporally adjacent vertices, each vertex representing an event instance of one or more events, and each arc representing a level of causal connectivity between at least two vertices, wherein the causal relationship detector is configured to detect the causal relationships based on the one or more graphs, wherein at least two connected vertices represents the causal relationship between a set of entities.