Explain V Model? How it is different from Waterfall model?

"V" Model is one of the SDLC Methodologies.
In this methodology Development and Testing takes place at the same time with the same kind of information in their hands.
Typical "V" shows Development Phases on the Left hand side and Testing Phases on the Right hand side.
Development Team follow "Do-Procedure" to achive the goals of the company
and
Testing Team follow "check-Procedure" to verify them.




Differences In V-Model and Waterfall Model
  1. In Waterfall Model the tester role will take place only in the test phase but in V-Model role will take place in the requirement phase itself
  2. Waterfall madel is a fixed process u can't make any changes in the requirement or in any phase.but in V-Model u can make any changes in the requirements
  3. V-model is the simultaneous process but it is not in case of water fall model
  4. waterfall model used only the requirements are fixed but V-model can be used for the any type of requirement(Uncertain requirement)
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