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During the Verify Phase, the team introduces the design of the product or process and performs the validation testing to verify that it does meet customer and performance requirements. A prototype testing plan is developed and results obtained. After the prototype is built/assembled, the testing plan is implemented to verify the design meets customer and performance requirements developed per the plan. This phase includes development of a test plan, implementation of the test plan on a manufactured/built/assembled prototype, results obtained and analyzed, and may also include ECN (engineering change notice) from testing results and/or manufacturing (build) process.