Architecture, which defines the fundamental organization of a system, is characterized by its components, the relationships between those components and with their environment, and the principles that are used to guide the design and further development of the objects involved. As such, service management also has its own architecture: the service management architecture (SMA).
Service management architecture: The fundamental organization of a service management system in its components, their relationships with each other and the environment, and the principles that guide its design and development.
Read all about USM's service management architecture in the USM Wiki.