ITIL ® is a Best Practice for IT Service Management used by thousands of organizations around the world. The knowledge and guidance is contained within the ITIL books and the supporting certification and qualification scheme. ITIL provides the foundation for quality IT Service Management through documented, proven processes that cover the entire Service Lifecycle.
ISO/IEC 20000, or ISO 20000, is the international IT service management (ITSM) standard that enables IT organizations to ensure that their ITSM processes are aligned both with the needs of the business and with international best practice. It is broadly aligned with, and draws strongly on, ITIL®.