this post was submitted on 20 Sep 2023
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There's at least one additional issue, and I think it's something Walmart ran into when trying the RFID for checkout and it's the noisy radio environment which led to issues scanning all of the codes properly or including other people's items as one of your purchases if it's too close (eg. the self checkout counters being close by or shopping with a friend/partner who is behind you.)
Yea, that does sound like breaking problem. I have no clue how to begin solving that one.
I feel like there was an idea, not in this article, where people would scan items as they add them to their cart and then this walkout process was really just a redundant verification of walking out with the purchase. Still, that does sound like a lot of error prone noise.
I don't know what's been tried in a real retail market, but I remember Walmart or perhaps just designers trying all sorts of ideas from carts that scanned them to people using their phones. It starts to get really complicated when people want to remove things or you have multiple people putting stuff in carts (eg. children sneaking items in)
I'm sure it's solvable, it's just a question of whether it's worth the cost for shoppers and the stores.
There's another challenge that the self-checkout poses where people cover the UPCs with UPCs for cheaper items (either self printed, or by taking off stickers from cheaper items). Most of these RFID things are also stickers so that also becomes a problem.