GMS 401 Chapter Notes -Takt Time, Material Requirements Planning, Kaizen

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Just-in-time (or little jit): production system in which processing and movement of parts/modules/work- in-process occur just as they are needed, usually in small batches. In a broader sense, jit also called big jit, is a philosophy of waste reduction, be it inventory or resources (such as workers, equipment, or floor space), and continuous improvement. Jit is identical to lean production: jit in a broad sense, is a philosophy of waste reduction and continuous improvement. Jit, in the narrower sense, is sometimes contrasted with material requirements planning (mrp). Mrp relies on computer-based component scheduling system to trigger and push production through the process, whereas jit relies on visual signals to trigger and pull production and deliveries through the process. Examples: overproduction, unnecessary inventory, waiting, overprocessing, inefficient work methods/excess motions: continuous improvement: kaizen is continual work to improve the system. Improvement should be done gradually and continuously: everyone should be involved, relies on direct observation and data collection.

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