Software Engineering

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10.4 
Documenting the functional architecture
3. 
Specify the solution.
 The elements of the functional solution resulting from 
the decomposition of a complex function must be specified. The requirements 
for each element must establish the performance and resource utilization objec-
tives for each subfunction. Data persistence transaction characteristics, failure 
detection and recovery actions, and data item properties must be quantified. 
Specification of the functional solution provides the basis for further decom-
position, behavioral analysis, and specification of the remaining complex 
functions.
4. 
Assess functional complexity.
 The functional solution must be assessed to deter-
mine if further functional analysis and allocation is necessary.
●
  If a function is determined to be complicated, then repeat steps 2 and 3 for 
each complex function.
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  If a function is determined to be noncomplex, then its specifications and 
hierarchical and behavioral diagrams must be placed under technical con-
figuration control.
5. 
Simplify the functional architecture.
 As the functional architecture evolves, it 
is prudent to review the functional configuration to identify opportunities by 
which the architecture can be simplified.