In a Just-In-Time (JIT) production system, purchasing is critical to the success of the operation. It is harder to implement than other aspects of the system because it involves an external element to the system - the supplier. A purchaser seeks a single, reliable supplier that is willing to deliver quality items, in the amount and at the time needed. A long-term contract is generally negotiated between the two parties where the order quantity, delivery frequency, quality level, and price are specified.
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