You are a consultant helping to turn around a factory that hasn't adapted to modern manufacturing standards. They receive several truckloads of raw materials each day, which are recorded by hand in a logbook kept at the loading dock. Each of the salesmen keeps a running tally of orders and files them in the sales office. The deliveries are made once a truck is filled. What aspects of this factory can be significantly improved by introducing an EPR (enterprise resource planning) system?

environmental management
sales and revenue
human resource management
equipment maintenance