Requirement Verification
Requirement Verification is a process that takes place during the early stages of software development. It is primarily done by developers to ensure that the requirements gathered in the previous phases are correct, consistent, and complete. This process can involve both static methods, like reviews and inspections, and dynamic methods, like unit and integration testing. The main goal is to identify and eliminate errors that might have been introduced in the previous phase.
Requirement Validation
Requirement Validation is conducted after the software has been built. This process is typically carried out by testers and focuses on ensuring that the developed software meets the requirements as specified in the SRS. It is a dynamic process that involves system testing to validate that the software behaves as expected and satisfies the needs of the end-users. The primary objective of requirement validation is to ensure that the final product is free from errors and aligns with the user’s expectations and needs.
| Aspect | Requirement Verification | Requirement Validation |
| Timing | Before and while developing the software. | After the software is built. |
| Focus of Checking | Artifacts of previous phases. | Software Requirement Specification (SRS). |
| Performed By | Developers. | Testers. |
| Purpose | To eliminate errors from the last phase. | To make the final product error-free. |
| Activities Involved | Unit testing, integration testing, etc. | System Testing. |
| Nature | Can be a static or dynamic process. | Always a dynamic process. |
| Outcome | Confirmation that requirements are accurate, clear, and complete. | Assurance that the software functions as intended for the end-users. |
Kalo kalam Dictionary:
End User is the individual who uses a product or software application after it has been developed and deployed.
Artifact refers to any byproduct produced during the software development process such as documents, models, diagrams, code, executables, test cases etc.
Static Process involves examining software artifacts (like code or documentation) without actually executing the software.
Dynamic Process involves executing the software or system to observe its behavior and outcomes.
Unit Testing is the process of testing individual components or units of a software in isolation to ensure they function correctly.
Integration Testing is the process of testing the interactions between integrated components or systems to ensure they work together as expected.
System Testing is the process of testing a complete and integrated software application to ensure it meets its specified requirements.