
Unit inventory for developers: what a hold really is, and why the sheet fails
Two agents sold the same off-plan unit because the shared sheet said 'available' to both. The fix is not more discipline. Unit inventory is a sell-once problem whose hard part is holds, and a hold is a small record (a buyer, a deadline, a deposit) that a spreadsheet cell cannot carry. Why the sheet degrades on editors times velocity rather than unit count, and when it is still the right tool.














