A working version of the so ware is not available until late in the development process and the
users are completely cut off from the development until the acceptance–testing stage.
e phase of development does not necessarily refl ect progress toward completion. Entering the
test stage may mean anything from 20% to 80% completion.
e waterfall model is the earliest so ware process model and it is still very popular.
2.4 THE “V” MODEL
e “V” model is a recognized standard for development of IT systems. It lays down what is to be done,
how it is to be done and what tools are to be used to develop an IT ...
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