Concept: Service Component
This concept describes Service Components, which are enterprise-scale assets (a managed software element with guaranteed availability, load balancing, security, performance, and versioning) that realize one or more services.
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Main Description

Concept: Functional Area Analysis and Concept: Business Subsystem (or Business Service Interface) describe how business subsystems abstractly represent aggregations of cohesive business functionality.  These are not IT assets and are not deployable into the IT infrastructure; they provide a bridge between the business and IT perspectives. Each business subsystem (or a functional area, if it has no business subsystems) is mapped into an Design Subsystem, which then is realized by one or more Service Components.  A Service Component is an enterprise-scale asset (a managed software element with guaranteed availability, load balancing, security, performance, and versioning). The Service Component is in turn realized by multiple Functional and Technical Components according to the diagram below. 

    Design Subsystem Functional Component Technical Component Functional Area Analysis  

Generally, each service assigned to a subsystem will result in a service component; functional and technical components can be shared between service components within the same business subsystem.

See Service Component Patterns for examples of five common patterns for realizing service components.

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