Software Engineering

FIGURE 1.2
The evolution of the WBS.

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1.8 
Integrated master plan and schedule
software architecture, as it evolves, provides the structural information necessary 
to establish the SBS. As a result of each stage of development the software archi-
tecture evolves to provide a more comprehensive and accurate description of the 
software product. This permits the estimated work remaining to implement and test 
the product to be increasingly accurate. The definition and evolution of the software 
architecture leads to an evolution of the SBS, WBS, and technical and organiza-
tional plans and schedules.