This International Standard provides guidance on the integrated implementation of ISO/IEC27001 and ISO/IEC20000‑1 for those organizations that are intending to either implement ISO/IEC27001 when ISO/IEC20000‑1 is already implemented, or vice versa, implement both ISO/IEC27001 and ISO/IEC20000‑1 together, or integrate existing management systems based on ISO/IEC27001 and ISO/IEC20000‑1 . This International Standard focuses exclusively on the integrated implementation of an information security management system (ISMS) as specified in ISO/IEC27001 and a service management system (SMS) as specified in ISO/IEC20000‑1 . In practice, ISO/IEC27001 and ISO/IEC20000‑1 can also be integrated with other management system standards, such as ISO9001 and ISO14001 .