Formally: ITIL defines the organisational structure and skill requirements of an IT area and documents a set of operational management procedures to allow management of an IT operation and infrastructure. Importantly, the operational procedures are supplier independent.
The ITIL framework itself comprises seven 'sets' (or volumes): Service Support; Service Delivery; ICT Infrastructure Management; Security Management ; Planning To Implement Service Management; The Business Perspective; Applications Management;
The two most commonly used are the first two, Service Support and Service Delivery. These comprise of a number of 'disciplies':
Service Support: Incident Management; Release Management; Problem Management; Configuration Management; Change Management; Service Desk.
Service Delivery: Service Level Management; IT Service Continuity Management; IT Financial Management; Capacity Management; Availability Management; IT Security Management
Supporting this approach is a structure of examination and certification. The three levels of certification are: three levels of certification are ITIL: Foundation Certificate, Practitioners Certificate and Managers Certificate.