Software development process in five stages: analysis stage, design stage, realization stage, testing stage, maintenance stage.

1, analysis phase

Software development first need to carry out research and analysis of demand for perfect demand is an important factor in the success or failure of the software development project, refining the collection of user requirements, the establishment of a complete analysis of the model, write him into the software development process requirements, specifications and preliminary user manuals.

2, the design phase

Software design can be divided into two phases outline design and detailed design, in fact, the main task of software design is to break down the software into modules refers to the realization of a certain function of the data and program description. Outline design is the structural design, its main goal is to give the structure of the software module, expressed in software structure diagram.

Detailed design of the first task is to design the module of the program flow, algorithms and data structures, designers based on the software requirements specification document, to determine the software architecture, and then determine the implementation of each module algorithms, data structures and interfaces, etc., to write the design specification, the organization of the design review.

3, realize the stage

Software development process, each on a stage is the next stage of the implementation of the basis. Programming is also based on the software design, the software design of the various parts of the needs of the computer program code to achieve the operation, programming has a unified, standardized program writing rules to ensure that the software program is easy to understand, easy to maintain.

4, test phase

In accordance with the design of the customer software needs to be realized with the programming code, that is, after the completion of the software program, the need to write the program, the formation of the overall framework, the function of the unit, assembly, the system of three-stage test to test the correctness of the program written, as well as the customer's needs to meet the adequacy of the functionality to determine whether the software to meet the development of the Requirements, but also a process of identifying and correcting problems.

5, maintenance stage

Maintenance refers to the completion of the development of software and delivery of the software product after the use of error correction, adapt to environmental changes and enhance the functionality of software engineering revisions to do a good job of software maintenance, not only to remove obstacles to enable the software to work properly, but also to expand the software features, improve performance, and bring significant economic benefits for users. The software maintenance work can not only remove the obstacles so that the software can work properly, but also expand the software functions, improve performance, and bring obvious economic benefits for users.