Patent ID: 7386472

Claim:
A method of detecting misappropriation of goods in a self-checkout lane in a store, the self-checkout lane having an incoming goods path and a goods collection zone, and goods being passed, in service, from the incoming goods path into the goods collection zone; the incoming goods path including a product scanner electrically coupled to a processor, and the goods collection zone including a weighing scale electrically coupled to the processor, the method being performed by a processor and comprising the steps: (a) receiving input from the product scanner identifying goods introduced into the incoming goods path; (b) controlling one or more barriers at least partially surrounding the goods collection zone so as to restrict customer access to goods collecting in the goods collection zone; (c) calculating, by referring to a database of product weights, a total weight value representative of the total weight of the goods introduced into the incoming goods path; (d) once all the goods being checked out by a particular customer have passed onto the weighing scale, weighing the goods collectively at the goods collection zone by the weighing scale and producing a total weight signal for all the goods; (e) receiving from the weighing scale the total weight signal; and (f) comparing the total weight value of the goods introduced into the incoming goods path with the total weight of the goods collected at the goods collection zone and calculating a discrepancy between said weights; and (g) if the calculated discrepancy exceeds a predetermined value, inhibiting conclusion of a transaction for purchase of goods introduced into the incoming goods path and collected in the goods collection zone and continuing to control the one or more barriers at least partially surrounding the goods collection zone so as to restrict access until the discrepancy is resolved and the transaction is concluded.