**Common Services Data Model** (**CSDM**) is a standardized [[Data model|data model]] developed by [[ServiceNow|ServiceNow]] that provides a consistent framework for organizing and managing [[Information technology service management|IT service management]] data across an organization. The model defines how [[Configuration item|configuration items]], services, and business applications relate to one another, enabling organizations to establish a single source of truth for their [[IT infrastructure|IT infrastructure]] and service relationships. CSDM emerged from ServiceNow's efforts to address the inconsistent data structures that organizations often develop when implementing [[Information technology service management|IT service management]] platforms. The framework organizes data into distinct domains, including a foundation layer containing [[Configuration management database|configuration management database]] (CMDB) elements, a design layer for modeling service architecture, and operational layers for managing live services and their supporting infrastructure. This hierarchical approach allows organizations to map [[Business Service (CSDM)|business services]] to their underlying technical components. The model has become widely adopted among ServiceNow customers as a best practice for platform implementation, particularly for organizations seeking to leverage advanced capabilities such as [[IT operations management (ServiceNow)|IT operations management]], [[IT asset management (ServiceNow)|IT asset management]], and service mapping. Adoption of CSDM facilitates improved [[Incident management (ITSM)|incident management]], [[Change management (ITSM)|change management]], and [[Impact analysis (ServiceNow)|impact analysis]] by establishing clear relationships between business-facing services and their technical dependencies.