The document summarizes improvements made to the materials department of a manufacturing plant in Reynosa, Mexico from 2006 to 2007. Key changes included implementing a phased approach to introduce quick fixes, improving inventory control through reference locations and cycle counting, emphasizing training, creating production control systems to eliminate duplicate production, implementing lean tools like visual management and kanban systems, and developing capacity planning tools. These changes helped reduce inventory levels, open purchase orders, and duplication while improving accuracy, visibility, and decision making.