Difference between Verification and Validation

Main Difference

Verification and Validation are the terms used for the checking process of a software. Verification is the checking of a product or software at its development phase either it is being developed to meet the required specifications. Validation is the checking of a product or a software at the end of its development process either it is meets the customer’s demands and needs. First the verification is performed and then validation is performed.

Verification

Verification is the checking of a product or software at its development phase either it is being developed to meet the required specifications. It involves meetings, reviews and inspections. It is carried by QA team. Plans, specifications, design and codes are evaluated.

Validation

Validation is the checking of a product or a software at the end of its development process either it is meets the customer’s demands and needs. It involves testing of black box, white box, grey box etc. It is carried out by testing team. The actual software developed is evaluated or tested.

Key Differences

  • Verification is performed before validation is performed.
  • Verification is the checking specifications as per requirements while validation is the checking of the software either it meets the customer’s requirements.
  • Verification is carried out at development phase while validation is performed at final stage of software development.
  • Verification is carried out by QA team while validation is carried out by testing team.
  • In validation the execution of code is carried but in verification code is not executed.
  • Cost of errors detected verification is less than cost of errors detected in validation.
  • Inspection is done in verification but not in validation.
  • Testing like black box, white box etc. are carried out in validation but nor in verification.
  • Validation relates to the user either the product is accepted by user or not while verification relates to the design and specifications of software.

Video Explanation

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