JIT requires work-in-process when used with kanban so there is inventory to pull.When compared to synchronous manufacturing, this is viewed as a negative aspect of JIT.

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JIT aims to minimize inventory and eliminate waste, but kanban requires a certain amount of inventory to be in the system to function effectively. In synchronous manufacturing, there is no need for work-in-process inventory as production is synchronized with customer demand. Therefore, the need for work-in-process inventory is viewed as a drawback of JIT when compared to synchronous manufacturing.

JIT Requires Work-In-Process When Used with Kanban So There Is