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For repeatable jobs , one may run the entire job with the first set of events that can be counted concurrently , then rerun the job with the next set of events that can be counted concurrently , continuing until the final set of events are counted . Each sub group should contain a set of events that define one discrete sequence of related events . Each encountered a set of events that constituted a turning point in his reign , and that led to change in direction of his initial policy . Signature-based detection looks for activity that matches a predefined set of events that uniquely describe a known attack . Every control on a form / report has a set of events that can occur . It is difficult to look at this situation and not see parallels to the disastrous set of events that transpired at the Baltimore Symphony Orchestra last season . This presents a challenge to designing a portable profiling interface : Is there a set of events that can uniformly handle a wide variety of garbage collection algorithms ? Here , we have a predefined set of events that can be raised in an object and we need to write custom handlers to handle those events .