Answer / manu radhakrishnan

V model usually focus on the functional requirements and dynamic testing activities corresponding to each development level. W model is an advanced version of V model. W model also includes static testing like architecture review, design review etc.

Answer / hema

V model will conclude verification and validation
together,both developement and testing team will be
involved at a time, progress is so fast
V model is proposed for long term projects like web
applications

W model is a step by step approach testing can be done once
the development is done completly,so no modifications can
be done in between
W model can be used for short term projects as medical
applications

Answer / vijayalakshmi

v model is nothing but verification and validation model.At
a time both verification and validations are done.So that
it is called as v-model

Answer / sagar

in v model both V&V takes place and can roll back any time
and it is used usually for bigger projects were as in
waterfall model you can not roll back i.e when ur in one
phase you should complete i.e, requirement
study,designing,codeing,testing then go for next step r if
any changes thr can be made and procedure is followed for
the change requirement request there coms the configuration
mgt,since the designing starts once the Doc is base lined
i.e after doc is being freezed

correct if m wrong

Answer / devendra meshram

We already discuss that V-model is the basis of structured testing. However there are few problem with V Model. V Model Represents one-to-one relationship between the documents on the left hand side and the test activities on the right. This is not always correct. System testing not only depends on Function requirements but also depends on technical design, architecture also. Couple of testing activities are not explained in V model. This is a major exception and the V-Model does not support the broader view of testing as a continuously major activity throughout the Software development life-cycle.

Paul Herzlich introduced the W-Model. In W Model, those testing activities are covered which are skipped in V Model.

The ‘W’ model illustrates that the Testing starts from day one of the of the project initiation.

If you see the below picture, 1st “V” shows all the phases of SDLC and 2nd “V” validates the each phase. In 1st “V”, every activity is shadowed by a test activity. The purpose of the test activity specifically is to determine whether the objectives of that activity have been met and the deliverable meets its requirements. W-Model presents a standard development life-cycle with every development stage mirrored by a test activity. On the left hand side, typically, the deliverable of a development activity (for example, write requirements) is accompanied by a test activity test the requirements and so on.
W Model final
Fig 1: W Model
W Model 2
Fig 2: Each phase is verified/validated. Dotted arrow shows that every phase in brown is validated/tested through every phase in sky blue.
Now, in the above figure,
Point 1 refers to - Build Test Plan & Test Strategy.
Point 2 refers to - Scenario Identification.
Point 3, 4 refers to – Test case preparation from Specification document and design documents
Point 5 refers to – review of test cases and update as per the review comments.

So if you see, the above 5 points covers static testing.
Point 6 refers to – Various testing methodologies (i.e. Unit/integration testing, path testing, equivalence partition, boundary value, specification based testing, security testing, usability testing, performance testing).
After this, there are regression test cycles and then User acceptance testing.

Conclusion - V model only shows dynamic test cycles, but W models gives a broader view of testing. the connection between the various test stages and the basis for the test is clear with W Model (which is not clear in V model).

Answer / srikanth

In V-model testing of the product is planned along with the
corresponding phase of development.But in water fall model
testing is done after development phase.

Answer / 12345678910

I don't know. Please somebody tell me it's answer.

Answer / kumar g

in V model testing will take simultaneously.

But in the case of waterfall model, testing will happen at
the end of development. (it is costly one- so that we can't
revert back)

As a software Tester will always like the spiral model.

Answer / sm

V model is the verification and validation SDLC model where
as W model is the Waterfall SDLC model

the only main difference between these two is in V MODEL the
testing phase also starts from the starting of the
development phase.where as in W model only at the last stage
we can find the testing phase

Along with that in v model we are maintaining different
testing team to conduct testing where as in w model
sometimes the developers if self conduct the testing phase.

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