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In an effort to control vehicle development costs, engineering staff have fostered concurrent engineering methods. This is a method whereby interior styling is linked to conceptual development; system and component engineering are linked to systems validation, and product design is linked to manufacturing development. Specifically in systems engineering and validation, closed loop development efforts which employ computer aided engineering performance simulation in concert with high frequency systems performance data, expedite the validation of the product performance. In this manner, the actual loads of the event such as air bag deployment or knee intrusion during crash are related to the performance of the product. An example of this closed loop development effort shall be presented.