Information Technology Reference
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Preliminary
investigation
Analysis
Reject prototype
Design
Construction
Approve prototype
Complete
system
components
Cutover
Figure 2.2
The prototyping development life cycle
SDLC methodology. Figure 2.2 also illustrates the requirements prototype by virtue
of the design iteration, with the blueprint serving as the basis for completing the
system components such as software, hardware, and data. In other cases, a prototype
called an evolutionary prototype is built to contain all of the operational features of
the system and is put into use upon approval.
Although the classical SDLC has been largely replaced, prototyping con-
tinues to be used in many development projects, especially those of relatively
simple PC-based systems like electronic spreadsheets and database management
systems.
2.3.3 Rapid Application Development
Computer consultant James Martin conceived of the rapid application development
( RAD ) in an effort to expand the classical SDLC to larger scale projects while
substantially reducing the implementation time by 2-3 years. [12] RAD consists
 
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