The USM service management system is a control plane specifically for service management, and sits in between governance and execution. In the context of "graph-based control planes," the term "planes" is correct and distinct from "plans." Here's why:

• What Are Control Planes?
• Why "Graph-Based Control Planes"?
• Why Not "Plans"?
• USM as a Control Plane for Service Management
• How USM Functions as a Control Plane
• Positioning Between Governance and Execution
• Why is This Important?