V-Model STLC

 The V-Model is a software development and testing approach that emphasizes a parallel process of testing corresponding to each stage of development. It is called the V-Model because of the shape of the process, where the development and testing paths are parallel until they converge at the bottom.

Here's a brief overview of the V-Model in Software Testing Life Cycle (STLC):

1. Requirements Analysis:

   • Development: Requirements are gathered, and system design is prepared.
   • Testing: Test planning is done, and testing requirements are determined.

2. System Design:

   • Development: The system design is prepared based on the requirements.
   • Testing: Test cases are designed based on system design specifications.

3. Architectural Design:

   • Development: The architectural design is done, and the system is divided into modules.
   • Testing: High-level test cases are prepared.

4. Module Design:

   • Development: Detailed module design is done.
   • Testing: Detailed test cases are prepared.

5. Coding:

   • Development: Actual coding/programming of the software.
   • Testing: Unit testing is performed.

6. Unit Testing:

   • Development: Each module is tested independently.
   • Testing: Individual components are tested to ensure they function as intended.

7. Integration Testing:

   • Development: Modules are integrated to form a complete system.
   • Testing: Integration testing is performed to verify the interactions between integrated components.

8. System Testing:

   • Development: The complete system is tested.
   • Testing: System testing is performed to ensure the entire system works as expected.

9. Acceptance Testing:

   • Development: The system is handed over to the customer for acceptance.
   • Testing: Acceptance testing is done to validate if the software meets the customer's requirements.

In the V-Model, each stage on the left side of the V corresponds to a development phase, and each stage on the right side corresponds to a testing phase. The idea is that testing activities are planned and executed in parallel with development activities.

This model emphasizes the importance of testing at every stage of the development process to catch defects early, which can result in a more reliable and stable final product.