What is the V Model in the SDLC models?

Verification phase

The following phases are part of the verification process.

Requirement analysis

This is the foremost stage in understanding the product requirements on the customer side. This phase involves in-depth communication to understand customer expectations and clear requirements.

System design

Once we have exact and in-depth product requirements, it is time for us to design a complete system. This includes an understanding of and detailed description of all the hardware and communication equipment of the product that is under development.

Architecture design

This phase involves the choosing of an architecture. The selected architecture usually consists of:

• A list of modules
• The simple features of each module
• Their interface relationships
• dependencies
• Database tables
• Architecture diagrams
• Technology details

Module design

This phase specifies the complex internal design of all the system modules by dividing them into smaller modules. This is called low-level design (LLD). Consistency of design with other modules of the system architecture and additional external systems is important.

Coding phase

After conception, the coding phase is launched. As per needs, a suitable programming language is selected. There are approaches and criteria for coding. Before testing the repository, the final version is optimized for more acceptable performance, and the code undergoes multiple code inspections to verify implementation.

Validation phase

The following steps make up the validation phase.

Unit testing

Unit testing is performed at the code level. This step, allows errors to be eliminated at an earlier stage. However, all the faults may not be identified during unit testing.

Integration testing

Integration testing is linked with the architectural design phase. Integration tests are executed to check the co-occurrence and communication of interior modules in the design.

System testing

System testing is linked to the system design phase. System testing verifies the complete functionality of the system and the communication of the system, under development, with exterior systems. During this system check, errors related to compatibility between software and hardware can be identified.

Acceptance testing

Acceptance testing is linked to the business requirements analysis phase and requires us to test our product in our environment. Acceptance testing reveals compatibility problems with additional systems in the user environment. We can discover problems, such as load and poor execution, during the process of acceptance testing.