V-model: What Is It? How Does It Work?

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Mai Le

2022-05-27 04:49:45

vnext global V MODEL in software development

The V-model is a part of the SDLC in which the processes run in a V-shaped sequence. It can be called the Verification and Validation model, because testing is a must in each phase.


What is V-model?

The V-model is based on the correlation of a testing phase with each development step. Each stage requires the testing process. V-model has some significant advantages such as 

  • Containing specified deliverables and a review procedure for each step

  • Defecting tracking that is proactive, meaning faults are discovered early on


The main focus of V-model

  • Large to small: Testing in the V-Model is done in a hierarchical manner. The team identifies requirements , outlines design and executes the project. When a phase is completed, the next one becomes more and more detailed.

  • Cross referencing: The V-model necessitates a clear link between requirements and testing activities.

  • Data/ process integrity: Any project's design necessitates the integration and cohesiveness of data and procedures. Every need must have process aspects defined.

  • Scalability: The V-Model approach can handle any IT project, regardless of its size, complexity, or length.

  • Tangible documentation: A document is required for every project. Both the project development team and the support team require and use this material.


Steps of V-model

1. Verification: It entails using a static analysis approach (review) rather than running programs. It is the process of determining whether defined requirements are met throughout the product development phase. 


2. Validation: It entails the use of dynamic analysis techniques (functional and non-functional), as well as code execution testing. Validation is the process of evaluating software after it has completed the development phase to see if it satisfies the expectations and needs of the client. 


3. Design phase: 

  • Requirement analysis: This phase involves extensive discussion with the client in order to fully comprehend their needs and expectations. 

  • System design: The system design as well as the whole hardware and communication infrastructure for producing the product are included in this phase.

  • Architectural design: The system design is separated into modules for different functions. Data links between internal modules and the outside systems are well understood.

  • Module design: The system is broken down into small, detailed modules.


4. Testing phase: 

  • Unit testing: During the module design stage, unit test plans are created. This step is used to find and fix bugs in code.

  • Integration testing: After completing unit testing and in the architectural design stage, integration testing is the next step. The components are combined as a system. This step makes sure that modules can communicate with each other.

  • System testing: System testing examines the functionality, interdependence, and communication of the entire program. It examines the progam’s functional and non-functional needs..

  • User acceptance testing (UAT): UAT ensures that the provided system satisfies the needs of the user and is suitable for usage in the real world.


Read more: 8 Software Development Models You Can Apply To IT Projects


Of course, there are other approaches used in project planning, such as Kanban or XP, and you can choose one based on your needs. 


If you are looking for a trusted IT partner, VNEXT Global is the ideal choice. With 14+ years of experience, we surely can help you to optimize your business digitalization within a small budget and short time. Currently, we have 400+ IT consultants and developers in Mobile App, Web App, System, Blockchain Development and Testing Services. We have provided solutions to 600+ projects in several industries for clients worldwide. We are willing to become a companion on your way to success. Please tell us when is convenient for you to have an online meeting to discuss this further. Have a nice day! 

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