Now stamping no longer receives a schedule from production control.
With mapping icons the flow looks like this:
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However, you may have already noticed a problem with this pull system. With a cycle time of one second per pice and a changeover time of one hour, stamping would take one hour to set up to run only 60 seconds (60 ชิ้น) ของการผลิต.
Until changeover time on the stamping press is greatly reduced, replenishing what is
withdrawn from the stamping supermarket on a bin-for-bin basis is clearly not practical.
Due to changeover time, stamping needs to produce batches larger 60 pieces between changeover. With the initial goal of “every part every day”, stamping’s target batch size for steering brackets would be approximately 600LH and 320 RH pieces (which will still require changeover-time reduction). Stamping will keep 1.5 days of parts in its supermarket, one-half day extra to allow of replenishment delay and some stamping problems.
So Acme will use a signal kanabn to schedule stamping. In this case the kanban (often a metal triangle) for left-and right-drive parts is brought from the supermarket to the stamping press whenever the number of bins remaining in the supermarket drops to a trigger (“minimum”) point. When a triangle kankan arrives at the stamping press’s scheduling board, it initiates a changeover and production of a predetermined batch size of a specific part. Stamping sit;; does not receive a schedule from production control.