6 stages: 1. Problem definition and planning stage, which mainly determines the development purpose and feasibility of the software, and formulates a development plan; 2. Requirements analysis stage, conducts detailed analysis of each function that the software needs to implement; 3. Software design stage, mainly based on the results of demand analysis, design the entire software system, such as system framework design, database design; 4. Software coding stage; 5. Software testing stage, discover problems existing in the software throughout the design process and correct them; 6. Software operation and maintenance phase, used for version, product launch (version upgrade), and BUG repair.
The operating environment of this tutorial: Windows 7 system, Dell G3 computer.
Software Life Cycle (SLC), also known as software life cycle or system development life cycle, is the life cycle from the creation of software to its scrapping. During the cycle, there are problem definition, feasibility analysis, and overall description. , system design, coding, debugging and testing, acceptance and operation, maintenance and upgrade to abandonment and other stages. This time-based thinking method is an ideological principle in software engineering, that is, step by step and step by step, each stage is There must be definition, work, review, and documentation for communication or reference to improve the quality of the software. However, as new object-oriented design methods and technologies mature, the guiding significance of software life cycle design methods is gradually decreasing.
The six stages of the software life cycle:
1. Problem definition and planning stage (feasibility study stage)
Mainly determine the development purpose and feasibility of the software, and formulate a development plan
Like anything, a software product or software system must also undergo gestation, birth, growth, maturity, and decline. and other stages, generally called software life cycle (software life cycle). Divide the entire software life cycle into several stages so that each stage has clear tasks, making software development with large scale, complex structure and management easy to control and manage. The software life cycle can be summarized as software planning and feasibility study stage (problem definition, feasibility study), requirements analysis stage, software design stage (outline design and detailed design), software coding stage, software testing stage and software operation and maintenance stage. Software planning and feasibility study stage (problem definition, feasibility study): This stage is a joint discussion between the software developer and the demander to determine the development goals and feasibility of the software.
2. Requirements analysis/review stage
After determining that software development is feasible, conduct a detailed analysis of each function that the software needs to implement. The requirements analysis stage is a very important stage, and it is also a constantly changing and in-depth stage in the entire software development process. It can lay a good foundation for the success of the entire software development project.
Analyze the source (prototype diagram/software requirement specification), participants (host--product manager, other participation, R&D, design, testing), focus on one question--what is the purpose of testing the requirements analysis? ? (Know yourself and the enemy, so you can easily ask questions)
3. Software design stage (attribute: development work)
Outline design (database tables, etc. Framework stuff)
Detailed design (pseudocode level)
Mainly design the entire software system based on the results of the requirements analysis, Such as system framework design, database design, etc. Software coding stage: It is to convert the results of software design into program code that can be run by the computer. In program coding, unified and standard writing specifications must be formulated. To ensure the readability and maintainability of the program and improve the operating efficiency of the program.
4. Software coding phase
Developer tasks, programmer coding
5. Software testing phase
After the software design is completed, it must undergo rigorous testing to discover and correct problems existing in the software during the entire design process.
Tasks of test engineers or tasks of development
Development: unit testing,
Development or testing: integration testing---interface testing
Tester : System test,
Customer or product manager: Acceptance test---Alpha test, Beta test
6, software operation and maintenance stage
Yes The longest-lasting stage in the software life cycle, including corrective maintenance and improvement maintenance.
Version, product launch (version upgrade and improvement) BUG repair
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