Inside Amazon 's newer, robot-filled warehouses, the next big efficiency drive focuses on how humans move around the facilities, not just packages. If the plan works and scales, this could wring millions of labor hours out of the company's e-commerce operations every year, according to internal analysis viewed by Business Insider. These planning documents reveal Amazon is piloting a system called Full Facility Load Balancing, or FFLB, that automatically reassigns workers as package volumes and