These models are software development models which are waterfall development model, prototyping model, red model, incremental model in software engineering.
https://cyberteak.com/index.php/2020/06/04/software-development-models/

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These models are software development models which are waterfall development model, prototyping model, red model, incremental model in software engineering.
https://cyberteak.com/index.php/2020/06/04/software-development-models/
How does the butterfly model supports the test development?
Butterfly model is a test development model, consisting of two wings and a body which shows three components of a software testing process. It is accountable for both verification and validation purposes and is suitable for the testing activities of the V development model.