What stages does the software life cycle include?

Software life cycle is a concept widely used in software engineering. It covers a series of development States of software products from the conception stage to the final retirement and production suspension. In the process of software development, it usually goes through the following different stages:

1. Requirement analysis stage: The main goal of this stage is to define the customer's requirements, conduct detailed requirement analysis of the application, and provide guidance and feasibility analysis for the subsequent design and development process.

2. Design stage: At this stage, the program framework is designed, and the functions, modules, input and output of each subsystem, the interaction setting of each code and the algorithm selection are defined.

3. Coding and implementation stage: this stage is the stage of transforming software design into actual programming language, including developing program code, creating user interface according to software design, debugging, refactoring and other operations. At this stage, the cost of resources is high, but the lack of enough flexibility may lead to higher-level defects or difficult debugging problems.

4. Testing stage: This stage mainly tests and verifies the various characteristics of the software code to see whether it achieves the expected function and performance, and then realizes the important link of the software from the initial design stage to the completion of deployment.

5. Deployment and operation stage: after the test is completed and the software is officially launched, it will be made public for customers to use, maintain and eliminate bugs, and repair and adapt to the new environment. At the same time, it will monitor and deal with the fundamental defects in the released products, optimize the code and update the upgraded version at any time.

6. Termination stage: This stage is generally aimed at completely retiring the software that is no longer needed or stopped, including data backup and historical information preservation. ?

In short, each stage of the software life cycle has its own unique goals and tasks, which are interrelated and echo each other. These processes continue to advance and alternate, so that developers can establish requirements more accurately, optimize and improve software quality, and thus provide users with complete and stable applications.