4-day-mbse-with-core9_2018-reva

Use of Layer 1 & Layer 2 Items • The decomposition of the Geospatial Library requires the use of the Layer 2 Items as the Status Item has also been decomposed in the design. • One Item is handled by the Workstation • One Item is handled by the Command Center.

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_Perform System Context Functions Sequence Diagram

See H‐14

• Sequence Diagrams focus on triggering information  • Data Stores (items “input to” functions) are not shown  • External triggers are displayed  • Helps understand the way the activity interacts with the greater system

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