What is the bullwhip effect and why does it create logistics problems?

The bullwhip effect is the amplification of small customer demand fluctuations into progressively larger swings in production orders, inventory levels, and transport demand at each upstream supply chain node. A 10% rise in retail orders can generate a 60% surge in raw material orders by the time the signal reaches the supplier level — because each party builds a buffer against uncertainty without knowing every other party is doing the same. The logistics consequence: unplanned carrier capacity demands, expedited shipments at premium rates, and emergency warehousing at each level, followed by simultaneous order cancellations when the demand signal corrects. Sharing real-time demand data across supply chain nodes reduces the amplification by removing the information gaps that drive the buffering behaviour.