| Verification |
Validation |
| Are we building the system right? |
Are we building the right system? |
| Verification is the process of evaluating products of a development phase to find out whether they meet the specified requirements. |
Validation is the process of evaluating software at the end of the development process to determine whether the software meets customer expectations and requirements. |
| The objective of Verification is to make sure that the product being developed is as per the requirements and design specifications. |
The objective of Validation is to make sure that the product actually meets up the user’s requirements, and check whether the specifications were correct in the first place. |
| The following activities are involved in Verification: Reviews, Meetings, and Inspections. |
The following activities are involved in Validation: Testing like black-box testing, white box testing, gray box testing, etc. |
| Verification is carried out by the QA team to check whether implementation software is as per specification document or not. |
Validation is carried out by the testing team. |
| Execution of code is not coming under Verification. |
Execution of code is coming under Validation. |
| The verification process explains whether the outputs are according to inputs or not. |
The validation process describes whether the software is accepted by the user or not. |
| Verification is carried out before the Validation. |
Validation activity is carried out just after the Verification. |
| Following items are evaluated during Verification: Plans, Requirement Specifications, Design Specifications, Code, Test Cases, etc, |
The following item is evaluated during Validation: Actual product or Software under test. |
| The cost of errors caught in Verification is less than errors found in Validation. |
The cost of errors caught in Validation is more than errors found in Verification. |
| It is basically manually checking the documents and files like requirement specifications etc. |
It is basically checking the developed program based on the requirement specifications documents & files. |
