The **End-to-End Service Life Cycle** is the core model for the [[Common Service Data Model|Common Service Data Model]] (CSDM) 5, representing a portfolio-centric view that organizes CSDM domains as stages in the life cycle flow of service-related data within the [[ServiceNow|ServiceNow]] AI Platform. This model updates the [[CSDM Conceptual Model|historical view of CSDM]] by framing the domains as sequential stages through which an idea progresses from initial conception to operational delivery and consumption, with the [[Foundation (CSDM domain)|Foundation domain]] serving as a supporting layer beneath all stages and the [[Manage Portfolio (CSDM domain)|Manage Portfolio domain]] encompassing portions of all stages. The life cycle begins when a new idea or concept is captured and assessed in [[Ideation & Strategy (CSDM domain)|Ideation & Strategy]]; if the business decides the idea aligns with strategy and agrees to invest, it enters [[Design & Planning (CSDM domain)|Design & Planning]] where details are enhanced for future development. Development occurs in [[Build & Integration (CSDM domain)|Build & Integration]] where the idea becomes a deployable solution, and after passing various gates, it is released for use as part of [[Service Delivery (CSDM domain)|Service Delivery]]. Once delivered, the idea may be consumed by users while its value to the business is measured in [[Service Consumption (CSDM domain)|Service Consumption]]. Throughout this progression, feedback flows back to earlier stages to ensure delivery of the goals documented in Ideation & Strategy, creating a continuous improvement loop across the [[CSDM Service Life Cycle|CSDM Service Life Cycle]]. ![[CSDM-5-end-to-end-service-life-cycle.png]]