What is the V-model?

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What is the V-model?..

Answer / guest

Waterfall Model vs V-Model

In Waterfall Model the tester role will take place only in
the test phase. In V-Model role will take place right from
the requirement phase itself.

Waterfall model is a fixed process that u can't make any
changes in the requirement or in any phase. In V-Model u can
make any change in the requirements.

Waterfall model is a continuous process. V-model is the
simultaneous process.

Waterfall model used only after the requirements are fixed.
V-model can be used for any type of requirement (Uncertain
requirement).

Any mistake in Requirement phase can't be recognized in
water fall model until near the end when customer gets to
see the product. This leads to huge cost of correctives in
terms of economy. So it is time consuming too. Here for each
and every phase of the software life cycle there is a review.

Reduce the probability of occurring a mistake or defect.
Hence saves the cost. It saves time.

Emphasizes the development cycle and ignores the testing
cycle. Testing merely get time as development phase takes
almost 98% of project time. Gives equal importance to the
testing phase as development.

Waterfall model stages:
1.User Requirement
2.System Requirement
3.Global Design
4.Detailed Design
5.Implementation
6.Testing

V model stages:
1.Component testing
2.Integration Testing
3.System Testing
4.Acceptance Testing

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What is the V-model?..

Answer / v.lokesh

Basically this model is used to avoid defects r bugs in the
application and cost effective purpose,In this model we
will start the testing from begining of the project like
conducting the reviews on FRS,whether customer given all
requiremnts for developing the application r
not,understanding the system requirementsm i.e from
verfication(review) to validation(executing the code)

verifiaction-business requirements-system requirements-High
level design-low level design-Coding-unit testing-
integration testing-system testing-user acceptance testing-
validation

From system requirements stage we will start testing.
here we can ensure that right product is developed r not
during early stages and at every levels we can find the
defect and fix the defect,and at last the obtained product
is defect free......

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