WaterFall Model advantages:
                It is a linear sequestial model
                It is very simple model to implement
                It is the first model.
                It needs very few resources to implement
Disadvantages:
                In this model there is no back tracking.
                For example if any error occured an any
                stage of software development,it cann't be
                corrected in that build.

V-Model advantages:
                It is also called as verification and 
                validation Model.
                This means the verification and validation
                will be done side by side.
                It emphasies the strict process flow to 
                develop a quality product.
                The errors occured in any pahse will be
                corrected in that phase itself.
V-Model disadvantages:
                It needs lot of resources and money.
                It needs an established  process to 
                implement.
                It can be implemented by only some big
                companies.

Byeeee Friends

Rajendra 
rajendra_penumalli@yahoo.com

In the traditional waterfall model, testing is done at the 
end of the life cycle. The errors found at the later stages 
are very expensive to fix. This has given an idea to V 
model where in verification and validation are done at each 
stage of SDLC to avoid errors/defects getting cascaded to 
the other level. In other words V model aims for Stage 
containment.