Which tool is used for creating dependencies between configuration items in the CMDB?

The CI Relationship Editor is used to manually create and view *instances* of relationships between individual CIs, not to define the structural dependency types at a class level.

CMDB Builder is a tool to design and build CMDB data models, which includes classes and relationships, but the CI Class Manager specifically handles the *management* and suggested relationships for existing classes.

CI Service Manager is not a standard ServiceNow application or tool name for managing CI relationships.

The CI Class Manager is a tool within the CMDB that allows administrators to manage CI classes, their attributes, and importantly, define suggested relationships between different CI classes, thereby establishing the framework for dependencies.