Response from: Chris Kapsambelis

The prime justification for using RFID over barcode is the ability to read large groups of objects (a pallet load of goods) simultaneously. The failure to accurately achieve this goal was predictable. See following link:
http://www.aidc100.org/RFID-vs-Bar-Codes.344.0.html

Results from several pilot applications have shown that the accuracy for group reading with RFID is between 50% and 80%. This has forced current users to read each object as it is selected into the group, and link the data to a new group identity (Aggregation). Subsequently, the group can be tracked by reading its singular group identity code.
The substitution of the DataMatrix code for RFID suffers from the same deficiency. Imagers will probably read groups of objects with less accuracy then RFID. While it may be less expensive, it will not work any better.
If the AIDC problem is reduced to reading objects one at a time (Singulation), then linear barcodes are cheaper, and more accurate. The only reason to use 2-D barcode is when the object to be tracked is too small for a linear barcode, and there are plenty of objects in that category. The use of 2-D barcode for large objects is misguided.

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