Testing is not only limited to the validation and troubleshooting phase of the development. It is also used to front-load data into the hybrid simulation process by testing existing components and benchmarking competitive products for target setting purposes. It is more and more routinely used to provide loading information and feedback to update the CAE models. It is systematically used to provide test-derived models of components and sub-assemblies that will be added into hybrid CAE models at the full assembly level. It continues to be used for final production validation and monitoring throughout the lifetime of the product.