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Relating the Functional and Physical Models

Functional Hierarchy

Physical Hierarchy

_Perform System  Context  Functions

allocated to (performs) Integrated (Root)

System  Context

allocated to  (performs) Integrated (Root)

decomposed by

built from

̸̸̸̸

_Perform  Customer  Functions

_Perform  Geospatial  Library Functions

Geospatial  Library

Customers

…

allocated to (performs) Atomic

Command  Center

Function A

Function N

Workstation

A component’s top‐level functions are identified as “Integrate (Root)” in order to  identify that they represent the totality of functionality performed by the component.  The leaf‐level decompositions are identified as “Atomic.”

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Deciding/”Engineering” How to Allocate the System Functions

To allocate: drag the component that will perform the function on top of the  function and select the relation “performs”

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