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Cami Expands Its RFID Deployment
The automaker is not only using an active-tag system to replenish parts at assembly lines, but also to improve yard management and security.
Nov 28, 2007—What started as an application for improving parts replenishment on automotive manufacturing lines at Cami Automotive, a joint venture between Suzuki Motor Corp. and General Motors of Canada, has been expanded to also improve yard management and security, according to Michael Denomme, a systems architect who works for EDS Canada, which provides IT services to Cami Automotive.
The Cami Automotive plant, located in Ingersoll, Ontario, produces the Suzuki XL7, Chevrolet Equinox and Pontiac Torrent vehicles for the Canadian and American markets. Addressing attendees at the RFID Journal LIVE! Canada 2007 conference in Toronto on Tuesday, Denomme said that prior to implementing its current RFID system for parts replenishment, the plant relied on employees who moved up and down the assembly line to determine where replenishment parts were required, and the quantity needed. In other cases, the assembly workers requested parts verbally.
WhereNet. An assembly worker running short on a part or subassembly can press a button on a WhereTag II active RFID tag mounted at that employee's workstation. The tag transmits a unique identification number, associated with the part number, dock location and user location, to the nearest WhereNet antenna, along with a timestamp. The WhereNet system operates at 2.4 to 2.483 GHz.
WhereNet's WhereCall Wireless Parts Replenishment System software receives and processes the WhereTag II signal. This software validates each request, thousands of which are made daily, and then applies business logic based on the history of recent parts deliveries made to that section of the manufacturing line, along with the quantity of automobiles recently completed on the line, to prioritize the requests. The software then sends a replenishment request to a forklift operator. A WhereTag III active tag mounted on each forklift truck is used to track the vehicle's location in the facility, and to determine which truck is best positioned for a particular request. Once the system identifies the appropriate forklift, it sends a message to the driver's computer, linked to the facility's wireless LAN. The computer's screen then displays the part number, quantity and destination of the requested items.
Cami has seen significant benefits from using the RFID system, Denomme told attendees. Before implementing the system, the manufacturer stored parts requiring frequent replenishment in areas near the manufacturing line. Thanks to the WhereNet system, those parts are now kept in storage off the assembly floor. As a result, the company has been able to devote 50 percent more floor space to the manufacturing line. The facility has utilized that extra space, along with efficiency improvements from the RFID EPS, to boost its production significantly. "We used to make 175,000 per year, and now we make 275,000 annually," Denomme said, "and we have done so without expanding the facility, and with a reduced workforce."
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