Difference between event, change, incident, problem, urgent and expedite changes

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Accepted Answer

Event, change, incident, problem, urgent, and expedite changes are all types of changes in ITIL.

An event is a change in state that has significance for the management of a configuration item or IT service.
A change is the addition, modification, or removal of anything that could have an effect on IT services.
An incident is an unplanned interruption to an IT service or a reduction in the quality of an IT service.
A problem is the underlying cause of one or more incidents.
Urgent changes are changes that must be implemented as soon as possible.
Expedite changes are changes that are given priority over other changes.

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