A service provided by an IT service provider. An IT service is made up of a combination of information technology, people and processes. A customer-facing IT service directly supports the business processes of one or more customers and its service level targets should be defined in a service level agreement.
Other IT services, called supporting services, are not directly used by the business but are required by the service provider to deliver customer-facing services. See also core service; enabling service; enhancing service; service; service package.