Difference between V-model and Waterfall model

V-model is the most important model that is used in the process of software testing. It is also known as Verification and Validation Model. It is Introduced by the late Paul Rook in 1980s. V-model is a sequential process in which the next phase begins only after the completion of the present phase. In this model, steps don’t move in a linear way while the steps are bent upwards.

It is similar to Waterfall model because we follow V-model from left to right as well as follow a sequential path of execution of processes like as in waterfall model.in waterfall model steps are followed as requirements, design, implementation, verification and finally maintenance. In the same way, the same steps are followed in V-model. So we can say that V-model is the alternate of the waterfall model.

Difference between V-model and Waterfall model:
Besides that v-model is the alternate of the waterfall model. There is some difference between these two models which are given below.

Waterfall model V-model
The cost of Waterfall model is low. V-model is expensive.
Simplicity of Waterfall model is simple. Simplicity of V-model is Intermediate.
Flexibility of Waterfall model is Rigid. Flexibility of V-model is Little flexible.
Waterfall model is a sequential execution process. It is also a sequential execution process.
Waterfall model’s steps move in a linear way. V-model’s steps don’t move in linear way.
Re-usability of Waterfall model is Limited. V-model can be Re-use for some extent.
User involvement in Waterfall model is only in beginning. User involvement in V-model is also only in beginning.
In Waterfall model testing activities start after the development activities are over. In V-model testing activities start with the first stage.
Guarantee of success through Waterfall model is low. Guarantee of success through V-model is high.
Waterfall model is a continuous process. V-model is a simultaneous process.
Software made using Waterfall model, the number of defects are less in comparison of software made using V-model. Software made using V-model, the number of defects are greater in comparison of software made using Waterfall model.
Requirement specification in Waterfall model is necessary in beginning. Requirement specification in V-model is also necessary in beginning.
Waterfall model is less used now-a-days in software engineering. V-model is widely used in software engineering.

Attention reader! Don’t stop learning now. Get hold of all the important CS Theory concepts for SDE interviews with the CS Theory Course at a student-friendly price and become industry ready.

My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Improved By : amritansh222000, pp_pankaj

Article Tags :

Be the First to upvote.

Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.