犯罪：沃尔玛是如何防止自助结账时的盗窃的

How does Walmart prevent theft when customers use self-checkout?Mark Johnston, former EFL Teacher (2005-2012)When I worked at Walmart, self-checkout was my jam.There is always an attendant at the self-checkout area, both to deter theft, keep the place tidy, and assist customers when the machines act up. Each machine has its own video surveillance, as well as a few wider-angle cameras over the whole area. When you scan an item, the computer knows how much weight to expect to enter the bagging area. If you scan an item and don’t bag it or bag an item but don’t scan it, it will give an audible reminder.When it’s particularly busy we might have multiple attendants or make a show of checking receipts. It’s not foolproof, but it’s pretty good. Most people are, in fact, honest and/or risk averse. A truly flawless theft-prevention system would be costly to implement or lose business due to customer inconvenience - Walmart has evaluated the amount of loss it sustains ‘acceptable’ considering the alternatives.