SITUATION AWARENESS SYSTEM

A method for situation management includes specifying a composite event as a combination of two or more predefined component events and defining a rule, which causes a reaction to be invoked upon an occurrence of the composite event subject to a given condition. When at least first and second instances of the component events are received before invoking the reaction, the first instance is evaluated subject to the condition, so as to determine whether the first instance can satisfy the rule, before evaluating the second instance. Responsive to evaluating the first instance subject to the condition, it is determined that the composite event has occurred, and the reaction is invoked.