The Compact X-Scissors Device (CXD) is a passive device developed at Aalborg University (AAU) and integrated into a wearable orthosis provided by the startup company Liftya. It offers stability for patients with neuromuscular disorders or injuries but it does not support dynamic movement assistance. The goal of this thesis project is to improve mobility by modifying the CXD's design incorporating springs to reduce the weight on the arm, making movement easier for the user. To achieve this goal a Simulation-Driven Design approach was adopted, integrating simulations throughout the design process to provide deeper insights and explore a wider range of design alternatives.