just-in-time manufacturing (JIT)
Production-control system, developed by Toyota Motor Corp. and imported to the West, that has revolutionized manufacturing methods in some industries. By relying on daily deliveries of most supplies, it eliminates waste due to overproduction and lowers warehousing costs. Supplies are closely monitored and quickly altered to meet changing demands, and small and accurate resupply deliveries must be made just as they are needed. Because there are no spares, the components must be free of defects. Plants wholly dedicated to the JIT concept require a logistics staff to schedule production, balancing product demand with plant capacity and availability of inputs. JIT has worked most effectively for large automobile manufacturers, which may have several thousand suppliers feeding parts into 100 factories that assemble components for 20 assembly lines.
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