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This article is to share with you about the common software development models in computers. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Four common software development models are: 1. Mode V, which aims to improve the effect and efficiency of software development and reflects the relationship between testing activities and analysis and design activities. 2. The W model is composed of two V-shaped models, and the distribution represents the testing and development process. 3. H model. 4. X model, coding and testing separately for individual program fragments.

Software development life cycle model refers to the process from the initial conception to the public release of software products. There are different methods in the process of software development. I will talk about the different testing techniques used in different development modes.

1. V mode (waterfall mode)

V model, also known as waterfall model, is a common software development model, which aims to improve the effect and efficiency of software development, and reflects the relationship between testing activities and analysis and design activities. It is pointed out that unit and integration testing should check whether the execution of the program meets the requirements of software design, and system testing should test whether the quality characteristics of system function and performance meet the requirements of the system. Acceptance testing determines whether the implementation of the software meets the needs of users or the requirements of the contract. Each test step is carried out in accordance with the steps, and only after one test is finished can the next test be started. The practicability of this model is not high, and if the problem is found later, the repair cost is very high.

2. W model

The W model is composed of two V-shaped models, the distribution represents the testing and development process, and the testing and development are carried out synchronously, which is conducive to the comprehensive discovery of problems, requirements, design, coding and other activities this morning. Testing and development activities maintain a linear relationship, which can not support the iterative development model.

3. H model

The testing under H model is an independent process, which runs through the whole life cycle of the product and is carried out concurrently with other processes. Different testing activities can be carried out in a certain order, as long as a test reaches the ready point. The execution of the test begins with strong flexibility.

4. X model

The X model is a separate coding and testing for individual program fragments, through frequent handover, and finally synthesizing executable programs through integration.

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