This document provides an overview of the Service Transition stage of the ITIL framework. Service Transition focuses on moving new or changed services into live environments in a controlled and coordinated manner. Key processes covered include change management, knowledge management, service asset and configuration management, release and deployment management, and service validation and testing. The goals of Service Transition are to ensure services can be managed, operated and supported as specified after being deployed into production environments. Challenges include managing inputs from stakeholders, achieving process integration, and demonstrating benefits outweigh costs.