Achieving robust designs in short development cycles is the goal in many domains. Especially in power electronics where strong market growth took place during past years, the need is even stronger to create reliable designs with less engineering margin. Gaining design speed can be achieved by model-based engineering. The verification of simulated results and the built hardware is not an easy undertaking with lots of uncertainties. The presentation gives an overview on how double pulse testing can be used over the entire design cycle of power stages to support the model-based approach and gain faster trustworthy results in a shorter period.