What is the Difference Between Waterfall Model and V Model?

The Waterfall model and the V model are both widely used software development methodologies. They help in developing applications in a systematic way, but they have some key differences:

1. Cost: The Waterfall model is generally less expensive than the V model.
2. Simplicity: The Waterfall model is simpler, while the V model has an intermediate level of simplicity.
3. Flexibility: The Waterfall model is rigid, whereas the V model has some flexibility.
4. Defect Identification: In the Waterfall model, defects are identified during the testing phase, while in the V model, defects are identified from the initial phase.
5. Testing: In the V model, testing activities start with the first stage, while in the Waterfall model, testing is done after the completion of the development phase.
6. Phases: Both models have different phases, but they follow a similar structure. In the Waterfall model, phases are followed sequentially, while in the V model, phases are both sequential and simultaneous.

In summary, the primary difference between the Waterfall model and the V model is the way they handle defect identification and testing. The Waterfall model identifies defects during the testing phase, while the V model identifies defects from the initial phase. Additionally, the V model is more flexible and expensive compared to the Waterfall model.

Comparative Table: Waterfall Model vs V Model

The Waterfall Model and V Model are two different software development methodologies. Here is a table highlighting the main differences between them:

In the Waterfall Model, the software testing is done after the completion of the development phase, while in the V Model, the testing activities start with the first stage of the development cycle. The V Model is more flexible and allows for returning to earlier phases, which is not allowed in the Waterfall Model. The V Model also involves more customer involvement compared to the Waterfall Model.