What is the purpose of Service Transition?

The role of Service Transition is to deliver services that are required by the business into operational use. Service Transition delivers this by receiving the Service Design Package from the Service Design stage and delivering into the Operational stage every necessary element required for ongoing operation and support of that service. If business circumstances, assumptions or requirements have changed since design, then modifications may well be required during the Service Transition stage in order to deliver the required service.

Service Transition focuses on implementing all aspects of the service, not just the application and how it is used in ‘normal’ circumstances. It needs to ensure that the service can operate in foreseeable extreme or abnormal circumstances, and that support for failure or errors is available. This requires sufficient understanding of:

- potential business value and who it is delivered to/judged by
- identification of all stakeholders within supplier, customer and other areas
- application and adaptation of service design, including arranging for modification of the design, where the need is detected during transition.

Source: An Introductory Overview of ITIL V3 itSMF 2007