ITIL is the most accepted framework for IT Service Management (ITSM) in the world.
ITIL consists of a coherent set of best practices drawn from many public and business sectors. ITIL is the appropriate framework for organizations that (regularly) deal with supplying, using or supporting IT services. ITIL is based on the practice of IT Service Management and is expected to continue to be a guiding framework for a long time.
Many organizations are heavily dependent on their IT. ITIL provides the most detailed documentation for successfully setting up management processes within an IT organization.