Apply SMED logic to reduce steel mill roll-change downtime.
A cold mill roll change takes 72 minutes, and several steps occur after the stop even though they could be prepared earlier. SMED: identify elements, separate internal from external, convert internal to external, streamline what remains The common trap is buying faster tools before fixing the sequence. If parts, QA, permits, and settings are not ready, a better tool only speeds up a fraction of the loss. Observe the whole changeover Video the roll change and list each element with time cost: fetch chocks, clean gauge, remove guards, swap rolls, align, inspect first coil. SMED starts with actual elements, not…
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