ISO/IEC 20000, like its BS 15000 predecessor, was originally developed to reflect best practice guidance contained within the ITIL (Information Technology Infrastructure Library) framework (reference needed), although it equally supports other IT service management frameworks and approaches including Microsoft Operations Framework and components of ISACA's COBIT framework. The differentiation between ISO/IEC 20000 and BS 15000 has been addressed by Jenny Dugmore.
ISO 20000-1 is currently undergoing revision by ISO, specifically ISO/IEC JTC 1/SC 40 IT Service Management and IT Governance. The proposed revision is currently in the DIS stage (40.60) as of the end of December 2017, when voting on the proposed revision was closed. Ratification of the new standard, which will be realigned to the new ISO Directive 1, Annex SL management system structure, is expect to be formally released in the summer of 2018. At that point certified entities will enter a three year transition period to update to the new version of ISO 20000-1.