What is the diff. Between Waterfall and Spiral model?
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Answer Posted / chibi
When using the waterfall model, once each stage is
complete, you continue onto the next step, however you
cannot return to the previous stage.. The waterfall model
is only used when the requirements are well understodd and
there is no change in requirements.
In the case of using the spiral model, the completion
of one step can allow you to move to the next step or to go
back to the previous step.This means that the stages in the
spiral model can be repeated.
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