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The System Physical Boundary

System Context

• Referred to as the system “System Context”

External  Systems

Customers

Collectors

• Defines all external systems to which our system must interface and the mechanism(s) for interfacing • Provides a structure into which behavior can be partitioned and data assigned to interfaces Puts a boundary on the system problem  so we don’t add something that is not  intended or needed

Customer  Interface

Collector  Interface

System of  Interest

Geospatial  Library

Certification  Interface

External  Service

Customer Certification  Authority

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External Systems

• Interact with the System • Represented in the system design repository by the Component element class • Included in the hierarchy of Components using the “built from” relationship • Identified by Type attribute set to “External System”

System Context Component

built from / (built in)

System of Interest

External System External Syste Component

Component

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