AVAILABILITY & DEMAND IMPACT
Lost Sales
Lost sales are potential purchases that are not completed, often discussed in inventory planning when stock is unavailable and the customer does not wait or substitute. Their quantity and value may need estimation rather than direct observation.
LOST SALES IN PRACTICE
- Identify the eventSeparate unavailable stock from completed purchases.
- Estimate carefullyUse evidence and stated assumptions.
- Compare the responseWeigh service recovery against total cost.
Use the agreed units, actual records and approved procedures for your operation.
A WORKED EXAMPLE
A missed sale and a delayed sale differ.
A customer seeks an unavailable product. If the customer leaves without buying, the sale may be lost; if an accepted backorder is later fulfilled, the immediate shortfall is a different outcome.
WHAT THIS MEANS FOR YOUR QUOTE
Agree the requirement before comparing quotes
Use the actual shipment, stock and service requirements. Record the billing unit, included work and responsibility for exceptions.
A LITTLE MORE CONTEXT
Questions about Lost Sales
Is every stockout quantity a measured lost sale?
No. Customer behavior and evidence matter.
Is lost revenue equal to lost profit?
No.
Can recorded sales hide unmet demand?
Yes. Stockouts can suppress observed sales.
Source & example notes
Definition and operational example prepared by 3PL Hub. Examples describe hypothetical requirements; verify the actual records and agreed procedures for your operation.
Quantities, costs and scenarios are illustrative, not operating targets, approved handling instructions or guarantees. Source guidance reviewed 23 October 2026.
Last updated: · 3PL Hub
