What is service transition in ITIL?

Service transition in ITIL refers specifically to the phase where new or changed services are moved into operational use. This involves a variety of processes aimed at ensuring that the service meets the agreed-upon specifications and is ready for use by customers. During service transition, activities such as planning, building, testing, and deploying services take place, allowing organizations to manage risk and minimize disruption to existing services and operations.

Key components of service transition include ensuring that all necessary documentation, training, and support materials are in place to allow for a smooth rollout. It also encompasses the change management processes that help ensure that changes to services are made systematically, reducing potential adverse impacts on current operations. This distinction makes it clear that service transition is not about evaluating performance or troubleshooting but about effectively and efficiently bringing new capabilities into the live environment.