THE SITUATION
Caterpillar wanted to increase productivity at its Decatur, Illinois 797 Mining Truck assembly line, which relied on a single-rail assembly line. The assembly line routinely produced production bottlenecks, as the trucks were hard to move off the rail. However, the system had successful elements that Caterpillar wanted to retain. Due to the nature of the assembly line, all equipment had to be flush to the ground to interface with existing rail lines.