| Popular line sells out on Friday | Product hidden until restock | Sold against confirmed inbound | Only where the supplier date is reliable. Unconfirmed stock should not carry a public date. |
| Container lands 40% short | First to complain gets filled | Allocation rule applied automatically | Consistency matters more than which rule you pick, and the rule should be visible internally. |
| Supplier pushes the date out a month | Customer finds out by asking | Automatic message with the new date | Also the point at which a customer should be offered a straightforward cancellation. |
| Order with one available line | Whole order waits | Split by value and customer type | Freight cost is the deciding factor. Set a threshold rather than deciding order by order. |
| Card authorisation expires | Payment fails at despatch | Re-authorisation requested before pick | Long lead preorders need a payment approach that survives the wait. |
| Wholesale account wants everything at once | Split shipments and complaints | Consolidation flag on the account | Account level despatch preferences are cheap to implement and quietly valuable. |
| Item is cancelled by the supplier | Sits in backorder for months | Flagged, refunded, customer told | Aging reports should force the decision rather than letting it drift indefinitely. |
| Marketplace channel | Preorders listed the same way | Excluded or handled separately | Marketplace despatch deadlines rarely tolerate long lead times. Check the rules per channel. |