2 the difficulty of obtaining shipping at a cost low enough to justify many small deliveries, 3 the likelihood of occasional shipping delays if suppliers are hundreds of miles away,and 4 the frustrating tendency for a low-cost,allegedly noncritical part to become critical when it does not arrive on time and an important customer's order cannot be finished be cause there is no safety stock. for these and other reasons,some companies claim to have adopted just in time but continue to keep safety stock of many materials"just in case." For example, it has been reported that the Nissan truck plant in Smyrna,Tennessee,has only one true JIT materials-seats,delivered daily by a single supplier with no safety stock ever held.Some other materials are quasi-JIT,being delivered twice per week;but a sixable percentage of allpart are still supplied in large lots as in any traditional purchasing system.
2 the difficulty of obtaining shipping at a cost low enough to justify many small deliveries, 3 the likelihood of occasional shipping delays if suppliers are hundreds of miles away,and 4 the frustrating tendency for a low-cost,allegedly noncritical part to become critical when it does not arrive on time and an important customer's order cannot be finished be cause there is no safety stock. for these and other reasons,some companies claim to have adopted just in time but continue to keep safety stock of many materials"just in case." For example, it has been reported that the Nissan truck plant in Smyrna,Tennessee,has only one true JIT materials-seats,delivered daily by a single supplier with no safety stock ever held.Some other materials are quasi-JIT,being delivered twice per week;but a sixable percentage of allpart are still supplied in large lots as in any traditional purchasing system.
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