V-shaped model (development through testing)

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This model can be called an improved version of the “waterfall”. The customer, together with the development team, forms the requirements for the system and describes how it will be tested at each stage. The V-shaped model began to be used in the 1980s.

Advantages:

Minimal bugs in software architecture.
Polymorphism: the essence, application problems

Disadvantages:

As with the cascade model, if mistakes were made during the creation of the architecture, it will be quite difficult to fix them.
Development through testing is the best option for projects that require high reliability. Say, for example, when creating airbags for cars or patient monitoring systems in medical facilities.