There are various Software development models or methodologies, below are the list if Software development methodologies / model: 1. Waterfall model 2. Vmodel 3. Incremental model 4. RAD model 5. Agile model 6. Iterative model 7. Spiral model 8. Prototype model Choosing right model for developing of the software product or application is very important. Based on the model the development and testing processes are carried out