This study explores the potential of Augmented Reality (AR) technology in revolutionizing assembly worker instructions by addressing the limitations of traditional paper-based methods. A study is developed to compare assembly instructions, integrating AR with Visual Management (VM) principles to improve clarity, efficiency, and spatial comprehension. The research involves the creation of a VM-AR laboratory demonstrator in a learning factory, along with both paper-based and AR-based assembly instructions. The case study is based on the assembly of a simulated simplified control panel developed specifically for the experiment. Controlled user trials are conducted to assess key performance metrics based on time, errors, comprehension, and user experience. The results show that AR-based instructions significantly enhance assembly efficiency, reduce errors, and improve user satisfaction compared to traditional paper instructions. This study highlights the potential of combining AR and VM to streamline complex assembly processes and offer strong support to workers in industrial settings.