Supply Chains
Phantom Demand and the Orders That Were Never Really There
When supply tightens, buyers order more than they need from more suppliers than they need, creating an order book that overstates real demand and misleads everyone reading it.
During a shortage, order books can swell far beyond what end customers actually want. The extra orders are real documents representing demand that does not exist.
How the duplication starts
A buyer who needs a part and cannot get a firm date places the order with a second supplier, and often a third, intending to take whichever arrives first.
From each supplier's view, a genuine order has arrived. Nothing in the paperwork indicates that the same requirement is sitting in two other order books.
Buyers also inflate quantities when they learn supply is allocated by order size, because asking for more is the only way to receive enough.
Why the signal looks convincing
Suppliers judge demand by what customers commit to, and a purchase order is the strongest commitment available short of payment.
When those orders arrive from many independent customers at once, the pattern reads as broad market strength rather than as a shared reaction to scarcity.
Nothing in the data distinguishes a duplicated order from a new one, which is why the distortion is usually recognised only after it unwinds.
The investment consequence
Capacity decisions are made on demand signals. A supplier reading an inflated book may commit to new lines, equipment and hiring that take years to complete.
Those additions arrive after the shortage has resolved, into a market where the duplicate orders have been cancelled and true demand is lower than the peak suggested.
The result is a swing from scarcity to surplus that is sharper than any change in end consumption, and it recurs across industries with long capacity lead times.
The cancellation cliff
When lead times shorten, the reason for duplicate ordering disappears. Buyers cancel the redundant orders, usually all at once.
Order intake can fall dramatically in a short period without any underlying demand having changed, which makes the downturn look more alarming than it is.
Suppliers who understand the mechanism read that collapse differently from those who take it at face value, and respond less drastically.
What reduces the distortion
Some suppliers require non-cancellable orders or deposits during allocation, which raises the cost of speculative ordering and shrinks the phantom layer.
Others allocate on historical consumption rather than current orders, removing the incentive to inflate entirely.
Sharing consumption data along the chain helps most, because it lets each level distinguish between what is being ordered and what is actually being used.
Questions readers ask
Is just-in-time discredited?
No, but its preconditions are better understood. It performs well with short reliable lead times and less well where supply variability is high, which is a statement about context rather than a verdict.
How much buffer is the right amount?
It depends on demand variability, supply variability and the service level chosen. There is no universal figure, and applying one target across a whole catalogue usually wastes money and misses sales at once.
