A **Service Model** is a [[Product Model (CSDM)|Product Model (CSDM)]] type within the [[Foundation (CSDM domain)|Foundation domain]] of the [[Common Service Data Model|Common Service Data Model]] (CSDM), a reference architecture developed by [[ServiceNow|ServiceNow]] that provides prescriptive guidance on service-related definitions and data modeling within the ServiceNow AI Platform. A Service Model represents service products that an organization provides, develops, or consumes, serving as the product definition that [[Business Service (CSDM)|Business Services]], [[Technology Management Service (CSDM)|Technology Management Services]], and other service-related [[Configuration item|configuration items]] can reference through the model_id attribute. Service Models are recorded in the cmdb_service_product_model table and are one of ten base product model types extended from the cmdb_model table, alongside [[Application Model (CSDM)]], [[System Component Model (CSDM)|System Component Model (CSDM)]], [[Software Model (CSDM)|Software Model (CSDM)]], [[Content Product Model (CSDM)|Content Product Model (CSDM)]], [[Contract Model (CSDM)|Contract Model (CSDM)]], [[Facility Model (CSDM)|Facility Model (CSDM)]], [[Hardware Model (CSDM)|Hardware Model (CSDM)]], [[Consumable Model (CSDM)]], and [[Enterprise Good Model (CSDM)|Enterprise Good Model (CSDM)]]. Service Models follow the [[Product Life Cycle Process (CSDM)]] with stages including Ideation, Design, Operational, and End of Life, enabling [[Product Owner (CSDM)|Product Owners]] to track service product ownership, life cycle status, compatibility, and end-of-life details. Like all product models, Service Models are not configuration items; rather, service CIs reference Service Models using the "Model ID" attribute. The [[Service Offering Model (CSDM)|Service Offering Model (CSDM)]], a child of [[System Component Model (CSDM)|System Component Model (CSDM)]], provides version-specific product definitions for [[Service Offering (CSDM)|Service Offerings]] across the [[CSDM Service Life Cycle|CSDM Service Life Cycle]].