What are the software project development process models

1, waterfall model: is a software development model proposed in 1970, is an old method of computer software development, strictly follow the pre-planned sequence of steps of requirements analysis, design, coding, integration, testing, maintenance;

2, iterative development: is a software development process opposite to the traditional waterfall development, which has a much higher success rate and productivity. With this approach, development can be initiated before the requirements are fully defined and a portion of the system's functionality or business logic can be completed in a single iteration;

3. Spiral development: combines the waterfall model with the rapid prototyping model, emphasizes risk analysis that the other models ignore, and is centered on the idea that there is no need for everything to be clearly defined at the beginning; Very much a risk-driven methodology system, as risk assessments must be performed prior to each stage;

4. Agile Software Development: also known as Agile Development, a software development capability that responds to rapidly changing requirements, Agile development teams work as a whole, and the main modus operandi consists of working in short iterative cycles and delivering something at each iteration. Focus on business prioritization and check and adjust.