ISO/IEC 20000

ISO/IEC 20000 is the first international standard for IT Service Management. It is based on and is intended to supersede the earlier British Standard, BS 15000.
ISO 20000-1 ('part 1') "promotes the adoption of an integrated process approach to effectively deliver managed services to meet the business and customer requirements"
ISO 20000-2 ('part 2') is a 'code of practice', and describes the best practices for service management within the scope of ISO20000-1.