In ITIL, which term describes an occurrence that does not require action?

In ITIL, the term that describes an occurrence that does not require action is an event. An event is a significant change in state, typically related to the operation of a service or infrastructure. Events can be categorized into three types: informational, warnings, and exceptions. Informational events provide insights into the performance or use of services without necessitating an immediate response or action.

By collecting and analyzing events, organizations can understand trends, monitor system health, and ensure better service performance over time. On the other hand, incidents are situations that disrupt normal service operation and typically require immediate action to restore service. Alerts are typically notifications that indicate a potential or existing issue that needs to be addressed, while notifications generally serve to inform stakeholders about events or changes but may not necessarily signify a change that requires action.

Thus, in the context of occurrences that do not require action, events encapsulate this definition the best within ITIL's framework.