The presentation will explain a multi-level and multidisciplinary approach for validating the measurement of driver states. We will also discuss how this approach can help automotive industry in structuring the DMS architecture for the next product generations. Three main takeaways from the presentation: – DMS validation requires a multidisciplinary approach and expertise (not only engineering !) – Validation of DMS performances at several system levels enables more flexible evolutions and improvements – No standard ground truth, driver states are not no black and white