Main characteristics of waterfall model

Waterfall model is one of the earliest development models in software engineering, and its main features are as follows:

1.？ Linear sequence: Waterfall model adopts linear development process, that is, it is carried out in the order of requirements analysis, design, coding, testing and maintenance.

2.？ Stage division: Waterfall model divides the software development process into different stages, and the completion of each stage must go through strict acceptance before entering the next stage.

3.？ Document-oriented: Waterfall model pays attention to the preparation and management of documents, and corresponding documents should be prepared at each stage, such as requirements documents, design documents, test plans, etc.

4.？ Poor reversibility: the development process of waterfall model is irreversible, that is, once a certain stage is completed, it cannot go back to the previous stage for modification.

5.？ Risk control: Waterfall model has set corresponding control points at each stage, so as to find and solve problems at an early stage, thus reducing the risks in the development process.