案例库 · 软件与 IT · 运营决策 · 1999–2005
这条还没译成中文，下面是英文原文。
Wal-Mart made a passive tag answer a reader, so pallets scanned themselves.
Passive UHF RFID tags, powered by the reader's radio, let a dock-door reader log every case and pallet at once, without line-of-sight or a person scanning.
Walmart
那一手
For decades a barcode was the fastest way to identify a product, but it had to be seen and scanned one unit at a time, so warehouses and registers paid for a person to align each package. The MIT Auto-ID Center proposed a cheap, passive UHF radio tag that could be read in bulk from a distance.
In 2004 Wal-Mart switched on its RFID pilot across eight Dallas-area sites, seven supercenters and one distribution center, after telling its top hundred suppliers they had to tag cases and pallets by January 2005. The tags are chips with radio antennas that answer a reader up to fifteen feet away, and the whole initiative centered on the electronic product code from EPCglobal, born out of MIT's Auto-ID Center.
The EPC was meant to replace the barcode. Where a barcode said what was in a box, the EPC said which exact pallet it was and where, so readers at dock doors could confirm a shipment the moment it arrived and feed inventory counts into the back-end systems without a scan. Tag prices were already falling, from about 60 cents to roughly 20 cents a year, as the standard drove volume.
为什么管用
- A passive tag is powered by the reader's own radio, so it needs no battery.
- Readers log many tags at once, unlike a barcode that needs one-by-one line-of-sight.
- A unique EPC tracks an exact item, not just a type of product.
- Dock-door reads turn arrival into an automatic inventory update.
可以搬走什么
When the constraint is human, one-at-a-time line-of-sight scanning, a tag that answers a reader's radio with a unique ID removes the scanning labour entirely.
后来呢
RFID moved from a supplier mandate to a standard part of supply chain operations, though the January 2005 deadline slipped as many suppliers struggled to meet it. The technology later expanded into apparel tagging, asset tracking and contactless payment, with the EPC number as the common language.
资料来源
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