IEC 20000-1:2011 - Information technology -- Service management -- Part 1: Service management system requirements
ITIL is the most widely accepted approach to IT service management in the world. ITIL provides a cohesive set of best practice, drawn from the public and private sectors internationally. IT Service Management (ITSM) derives enormous benefits from a best practice approach. Because ITSM is driven both by technology and the huge range of organizational environments in which it operates, it is in a state of constant evolution.