Jason wrote: > From: "Herbert Graf" > Sent: Sunday, December 10, 2006 4:13 PM > > >> Which would fail since the cart would detect the RFID tag of the first >> item, note it's weight, and then determine the actual increase in weight >> doesn't match. >> > > First, not when 1 item is a 20 pound bag of flour and the other is a 2 ounce > memory stick. Second, now you're talking about a scale in every shopping > cart along with the computing infrastructure to support it and probably and > RF link. How much are stores going to pay for shopping carts, especially > when carts are stolen all the time. > > >> Checking out in 5 seconds vs. 10 minutes? HUGE advantage IMHO. >> > > >> You're kidding, right? MOST people never even look at receipts, they >> just pay whatever the cashier says to pay. >> > > Everyone I know checks their receipts. Even if most don't now, they're > going to start when they repeatedly get home with items in their cart that > were added by pranksters and hear horror stories of all the items people > paid for because the scanner read a stray tag. > > Also, you can wait in line behind me and people like me a few minutes each > while we check the receipt :). Then you lose the speed advantage anyway. > > > > I wouldn't say that exactly, with an RFID system all checkouts would be 'open' so unless it was the night before christmas there generally wont be a line at a checkout. The RFID tags can be placed inside the packaging in many cases by the manufacturer, preventing casual theft. How does an RFID system handle things like buying things in variable quantities, grapes/nuts/coffee etc... -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist