Which stage of the service lifecycle includes the scope of service retirement and transfer of services between service providers?

Service Transition focuses on building, testing, and deploying new or changed services into the live environment, not on scoping retirement strategies or provider transfer plans.

Service Level Management is a process concerned with negotiating and managing SLAs and service targets, not with defining the scope of service retirement or inter-provider transfers.

Service Operation handles day-to-day service delivery and incident resolution, and does not define the planning scope for service retirement or provider transfers.

ITIL Service Design encompasses the full scope of designing a service from inception to retirement, explicitly including planning for service retirement and the transfer of services between service providers, ensuring these scenarios have defined processes and design artifacts before a service enters operation.