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/

seen from Poland
seen from Bangladesh
seen from China
seen from Italy

seen from Angola
seen from Brazil
seen from United Kingdom

seen from United States

seen from Malaysia
seen from United States

seen from Malaysia
seen from Türkiye
seen from Bangladesh
seen from China

seen from Malaysia

seen from United States

seen from Australia

seen from Chile

seen from Australia
seen from United States
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.