Order Quantities

Hi,

Any suggestions for forcing OPs' and OTs' order quantities to be a multiple of a specific order quantity by item? e.g. Set up multiple order quantity for item ABC = 10. Purchasers would be prevented from ordering any quantity of that item that isn't a multiple of 10. I know that MRP, if configured correctly, will use the Multiple Order Quantity field to suggest orders in multiples of the MOQ and will round up to the next multiple, but we're looking for a way to force that logic during manual OP and OT entry.

Thanks in advance for any suggestions.