Operations Management :

More a collection of many various tasks and procedures than a single process, together they enable IT to manage and perform the normal, day-to-day processing activities required for IT service delivery in accordance with agreed-upon service levels. Essentially they allow IT to "operate" the production environment required to deliver services. This process is closely tied to Incident Management (includes the Helpdesk) and Problem Management processes and valuable information is shared between them. There is also a close connection between this process and the Change and Configuration Management processes as well.