Consider this: You own a grocery store. You recently installed five self-checkout lanes that allow customers to scan their own groceries and pay for their purchases using an automated checkout kiosk. The kiosks are monitored by a single attendant. In recent weeks, management has become concerned that some customers are not scanning all of the items when using the self-checkout lanes.

Please suggest features and capabilities for the kiosks that would serve as control procedures, ensuring that all items brought through the self-checkout lanes are properly scanned and purchased.