What is the difference between Vmodel and Waterfall Model?

When you say the waterfall model, this is a type of model wherein there are different testing activities that need to be done after all of the development activities are already over. This is an ongoing process. When you say V−model, this is going to be a process wherein everything that needs to be done will be simultaneous.

The V−model is commonly used when there are some details that are still uncertain and would need to be changed in the middle of the process. If the requirement of the user is already known from the very beginning, the waterfall model will be more ideal.

The significant difference between the waterfall model and the V model is that in the waterfall version, the software testing is done after the completion of the development phase. In the V model, each stage is directly associated with the testing phase. The waterfall model is rather simple, and the complete process is apportioned into several stages. One phase should be completed to reach the next phase. Upon completion of testing, the software is allocated to the market. The V model is an extension of the waterfall model. It has a corresponding testing phase for each development phase.

The testing phase of the development phase is planned in parallel. This model is also called the verification and validation model. Once the phases have been checked, there is a high- level design. The coding then begins in the coding phase. Finally, the acceptance test is to test the software in the user environment. It also checks to see if the system is in line with the software requirement specification.