A travel chart plays a crucial role in enhancing plant efficiency by systematically improving the existing plant layout. It aids in identifying areas where processes can be streamlined, thus optimizing the movement of materials and personnel within the facility. By doing so, it ensures that the plant operates more effectively, reducing unnecessary delays and increasing overall productivity. While selecting plant locations and introducing new products are important aspects of plant management, the primary function of a travel chart is to refine the current layout for better operational flow.