Economic Definition of just in time. Defined.
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Term just in time Definition: A method of production in which inputs used in the production process are delivered to a firm or factory immediately before they are needed. Just in time limits the inventories of raw materials and intermediate goods kept on site. While this is credited with improving microeconomic production efficiency, it might also prevent macroeconomic business-cycle instability that is attributable to the unplanned build-up of business inventories.