Introduction: Within the Customer Support Applications Business Support (CS ABS) department in Veldhoven, you will join a team dedicated to keeping advanced lithography systems performing at their best in customer fabs worldwide. When on-product performance issues arise, for example when printed feature dimensions on a chip deviate from specification, it is our role, together with local support teams around the world, to identify the root cause and ensure the issue is resolved. This requires investigating a wide range of scanner characteristics, including aberrations, focus, dose, illumination, and many other system parameters that influence imaging performance.