27. A successful JIT system is based upon which of the following concepts? a. The company must rely upon a large number of suppliers to ensure frequent deliveries of small lots. b. The company should always choose those suppliers offering the lowest prices. c. The company should avoid long-term contracts with suppliers in order to exert pressure on suppliers to make prompt and frequent deliveries. d. A small number of supplier make frequent deliveries of specific quantities thus avoiding the buildup of large inventories of materials on hand.
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