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RAD (rapid application development) is a concept that products can be developed faster and of higher quality through:
The V-model is a software development model which can be presumed to be
the extension of the waterfall model. Instead of moving down in a
linear way, the process steps are bent upwards after the coding phase,
to form the typical V shape. The V-Model demonstrates the relationships
between each phase of the development life cycle and its associated
phase of testing.
Waterfall approach was first Process Model to be introduced and
followed widely in Software Engineering to ensure success of the
project. In “The Waterfall” approach, the whole process of software
development is divided into separate process phases. The phases in
Waterfall model are: Requirement Specifications phase, Software Design,
Implementation and Testing & Maintenance. All these phases are
cascaded to each other so that second phase is started as and when
defined set of goals are achieved for first phase and it is signed off,
so the name “Waterfall Model”. All the methods and processes undertaken
in Waterfall Model are more visible.
