What are the common traditional structured development models?

Common traditional structured development models are:

I. Iterative mode

The iterative model abandons the traditional process of requirements analysis, design, coding and testing, but turns the whole life cycle into several sprint stages, each of which consists of part or all of the above traditional processes. In each stage, it will include the following four stages: initial stage, detailed stage, construction stage and delivery stage.

Second, the spiral model

Spiral model, especially paying attention to the risk analysis stage, is especially suitable for huge, complex and high-risk projects. Usually the spiral model includes four stages: planning, risk analysis, project implementation and customer evaluation.

Three. prototype model

The first step of prototyping model is to create a rapid prototype, which can meet the needs of project stakeholders and future users to interact with the prototype. Then, through full discussion and analysis with relevant stakeholders, the requirements of the current system are finally found out, and after full understanding, the products that users are satisfied with are developed on the basis of the prototype.

Four. V type

On the whole, the V-shape is a V-shaped structure, which consists of left and right sides. The underline on the left represents requirements analysis, outline design, detailed design and coding respectively. The top row on the right represents unit test, integration test, system test and acceptance test.

Verb (abbreviation for verb) waterfall model

Waterfall model is a particularly classic and even a bit old-fashioned periodic model. Generally, it is divided into several stages: planning, demand analysis, outline design, detailed design, coding, unit testing, testing and operation and maintenance. The period of waterfall model is interlocking.

Iterative model, spiral model, waterfall model