The ISO 20000 certificate standard series consists of 5 standards.

ISO / IEC 20000 Standard is linked to and complementary to the process approach defined in ITIL (IT Infrastructure Library) developed by the Ministry of Commerce.

ISO 20000-1, ISO 20000-2, ISO 20000-3, ISO 20000-4, ISO 20000-5 are called ISO 20000 standard family.

It is a wrong concept to call ISO 20000 Certificate. Since the original certification and system installation are according to the ISO 20000-1 Standard, it would be more correct to call the name of the certificate ISO 20000-1 certificate ISO 20000-1 certificate.

The ISO 20000 standard family consists of the following standards.
1. ISO / IEC 20000-1: 2011 Information Technology Service Management System Terms
ISO 20000-1 Standard is the reference standard for Information Technology companies to establish Service Management Systems. At the same time, the ISO 20000-1 standard is the reference standard of accredited certification bodies that will certify these systems. Therefore, the certificate to be obtained is also the ISO 20000-1 certificate ISO 200000-1 Certificate.
2.ISO / IEC 20000-2 Information Technology Service Management System Application Principles
ISO 20000-2 is the application-related principles of the standard and includes the necessary instructions for the best implementation of the Service Management process within the scope of ISO / IEC 20000-1. The principles related to the application are prepared specific to that company for each company that is prepared for the ISO / IEC 20000 audit or plans to improve its services.
3.TS ISO / IEC 20000-3 Information technology - Service management - Part 3: guidance on the scope definition and applicability of the ISO / IEC 20000-1 standard
ISO 20000-3 standard is an auxiliary standard that explains how the scope of the system can be determined and how to apply the companies that set up the system according to the ISO 20000-1 Standard.
4.TSE ISO / IEC TR 20000-4 Information technology - Service management - Part 4: Process reference model
The ISO 20000-4 standard covers the applications of developing the process evaluation model in accordance with the ISO 20000-1 standard.
TS ISO / IEC TR 20000-5 Information technology - Service management - Part 5: Sample implementation plan for the ISO / IEC 20000-1 standard
The ISO 20000-4 standard includes a sample implementation plan on how service providers will implement the service management system in accordance with the requirements of the ISO / IEC 20000-1 standard.