Explain V model in depth?

Answer Posted / chabs

V-model is also known as Verification and Validation model
where the development and the testing team works parallely.
The CRS/BRS is sent to both developing and testing teams.
Where the developers/designers develop HLD, LLD then do
coding while the testers review and develop Acceptance test
cases and test plans, Integration test plans & cases,
functional test plans & cases.(in each stage i.e.,
CRS,SRS,HLD,LLD will be reviewed by the test engineers and
new document will be constructed if in case of any changes)

After white box testing is done at the developers side, the
product or the software is sent to the testing.

Now, this product is tested using the test plans and cases
(i.e.,they do Functional testing, Integration testing,
Acceptance testing) previously developed by the test
engineers(In the first phase they only develop test plans
and cases).
Finally, after doing the Acceptance testing the product is
moved to the production.

Advantage of this model is that each phase is tested
(i.e., defects in the customer requirements or any of the
documents is found out at the first phase)
so defects are rectified at an early stage.

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