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VALIDATION-MORE DEFINITION
 
Design (Product) Validation
  Establishing by objective evidence (documented) that device specifications conform with users needs and intended use.
   
Verification
  Confirmation by examination and provision of objective evidence that specified requirements have been fulfilled.
   
Retrospective Validation
  A validation that establishes evidence that a product or process performs to its specifications based on a review and analysis of historical performance data.
   
Prospective Validation
  A validation that establishes documented evidence that a product or process conforms to its specifications prior to final release of the product or process.