What is a Verification and Validation?

Verification:

Verification Typically involves reviews and meetings to evaluate documents , plans , code, requirements , and specifications. This can be done with the checklist , issues lists, walkthroughs, and inspection meetings.
Verification asks "Is the product being built right?"

Validation:

Validation typically involves actual testing and takes place after verifications are completed.
Validation asks "Is the right product being built?"
The term "IV and V" refers to independent Verification and Validation