A service event provides the list of entity events and the daisy chain of how dependencies on that entity affected other entities and eventually the service itself.
Service Impact performs root-cause analysis (RCA) and ranks each source entity event by its probability of being the root cause of the service event. In a service event, Service Impact identifies the affected service and the extent of the impact, the infrastructure dependencies and sub-dependencies that affect the service, and the most likely root cause. Service Impact often enables you to triage and diagnose problems before end-user complaints occur. You can then provide end users with confidence that you are aware of the issue and causes and are working a resolution.
The following figure shows a service event and the RCA. The Confidence column displays the probability ranking.