The problem
The figure is only worth what the trail behind it is worth.
Every jewellery business can tell you what it holds. Far fewer can show, line by line, how it got to that number and who touched it on the way.
Any TuesdayA piece moves from the safe to the display, and from the display to a customer’s hand for ten minutes. None of that is a transaction, and none of it is recorded.
A week laterA piece goes out on approval to a good customer. There is a note about it. The note is not in the accounts.
Month endThe count does not match. Somebody enters an adjustment. Nobody had to approve it, and nobody will ever ask about it again.
Quarter endThe accountant asks why closing stock moved. The answer is somewhere in a spreadsheet that has been edited since.
AuditThe question is not what you hold. The question is whether the number can be traced — and that is a much harder question to answer after the fact.
What it actually costsA number you cannot explain is a number you cannot defend
The control that matters here is not a clever pricing feature. It is that every movement is a posted document, adjustments need a signature, and a closed period stays closed.