Systems and methods are described for the execution and authoring of policies that use event rates for event management. The first system addresses policy execution. Included in this system are: a controller that provides overall operational control, a grouping engine, a rate detector, and a rate diagnoser. The second system automates the construction of event rate policies based on primary information sources (e.g., topology, inventory). The components of this system include: an authoring user interface, source-specific hierarchy generators, an event group generator and hierarchy builder, and a threshold constructor.