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External Interactions

System Context

Customers

Collectors

Geospatial  Library

Customer Certification  Authority

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Threads

• Defined as a single stimulus/response behavior path through a system • Give us insight on what the system must do to respond to different classes of stimuli to produce desired outputs and behavior • Basic tools for specifying/analyzing: • Interaction of a system with its environment and external systems • system behavior under different conditions

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