No. 1
How do identification technologies on a bread tray, from barcode labels to embedded RFID, differ in the supply chain visibility and loss prevention data they capture?
- 6 sections
- 2 tables
The difference is who creates the record. A barcode record exists only when someone points a scanner at the label, so the data is as complete as the scanning discipline at each location. An RFID record is created when a tagged tray passes a working reader, without a scan step, so the data is as complete as the reader coverage and the read reliability on loaded columns. Molded marks and colors identify the owner but create no records at all. Active trackers report location wherever a gateway or mobile network can hear them, but their device, battery and data costs fit higher-value assets such as racks and dollies better than individual trays. The right choice depends on where trays go missing in your network and whether you can act on finer data.
Four tiers of identification
| Tier | What creates a record | What the data shows | Main limit |
|---|---|---|---|
| Molded mark or color | Nothing; a person reads it | Ownership, sometimes type or pool | No history |
| Barcode (1D or 2D) | A person scans it | Tray, place, time and event type at each scan | Records only where and when someone scans; labels wear |
| Passive RFID | Tray passes an installed reader | Tray, reader location and time; whole stacks at once | Records only at reader points; reads must be measured on loaded columns |
| Active tracker (Bluetooth beacon, cellular) | Beacon heard by a nearby gateway or phone; cellular device reports over the mobile network | Location between fixed points, where that coverage exists | Battery, subscription and unit cost; suited to racks and dollies |
A standard identity ties the tiers together. GS1’s Global Returnable Asset Identifier (GRAI) is meant for returnable assets “like trays, crates, or pallets” and can identify them “by type and if needed also individually” (GS1 Australia on GRAI), and the same page says the GRAI can be encoded in a barcode or an EPC/RFID tag. Tracking single trays, rather than tray types, needs the GRAI with its serial number, and each read should record the type of event (dispatch, delivery, return, wash) as well as place and time. Using one key across barcode and RFID avoids two identity systems when a fleet moves from one to the other.
Barcodes: event data that depends on people
A barcode program gives tray-level history at the points where scanning happens: dispatch, delivery, pickup, return. That supports dwell time, cycle time, outstanding-tray reports and pool sizing, covered in detail in our guide to barcode visibility data.
Its weaknesses are practical. A label on a tray in the middle of a stacked column cannot be scanned without unstacking. Scans can be skipped under time pressure. Labels wear on washed trays; two-dimensional symbols tolerate more damage than linear barcodes (Data Matrix ECC 200 can reconstruct data from a symbol with 30 percent damage if the symbol can still be located, per the encyclopedia entry on Data Matrix), which helps only if your scanners read them.
Passive RFID: automatic reads where readers exist
A reader at a dock door or on a conveyor can record every tagged tray that passes, including trays inside a stack, without anyone presenting them. In North America, passive UHF RFID operates in the 902 to 928 MHz band, unlicensed with transmit power restrictions, according to the encyclopedia entry on radio-frequency identification. That gives three capabilities a barcode does not:
- Whole-load counts. A truck or dolly passing a portal can be counted tray by tray.
- Records without a scan step, so compliance is no longer a staff question at instrumented points.
- Denser history inside your own facilities, where you install readers.
What RFID does not do:
- It does not see nodes without readers. Stores and third-party depots that have no reader remain gaps, exactly as they are for barcodes unless someone scans there.
- It does not read perfectly by default. The same encyclopedia entry notes that UHF tags “are difficult to read when placed within a few millimetres of a metal surface”; metal racks, dollies and truck bodies are part of a bread tray’s environment. Tag position in the tray, tag orientation relative to the reader, stack density and the loaded product all affect reads. Treat read rate as a number to measure on loaded columns at each portal, not a property of the tag.
Because read rates below 100 percent produce small shortfalls on every load, reconcile counts against a tolerance set from your measured read rate, so that a normal shortfall is not flagged as loss on every truck.
Tray makers offer RFID as an option; SPF Plastic Group, for example, lists “RFID compatibility” for its SPF 650. Ask how the tag is attached or embedded, whether it survives your wash, and what read tests support it.
Active trackers: for racks and dollies
Bluetooth beacons are picked up by gateways or phones near them, and cellular trackers report over the mobile network, so both can show position between fixed reader points where that coverage exists, which is what neither barcodes nor passive RFID can do. Their device cost, batteries and data plans fit higher-value assets, such as metal racks and dollies, better than individual trays. A tracked rack or dolly can also locate the trays traveling on it.
Matching the tier to the loss problem
Start from where trays disappear and what you would do with better data.
| Your situation | Sensible starting tier |
|---|---|
| Small network, losses spread thinly | Ownership marking plus barcode scans at your own dispatch and return points |
| Losses concentrated at a few customers or partners | Barcode with enforced scanning at those nodes; RFID portals at your own docks to count what leaves and returns |
| High-volume DCs where scanning cannot keep pace | RFID portals at DC docks; barcode as the fallback |
| Racks and dollies going missing | Active trackers on those assets |
Theft is part of the loss picture in this industry. An American Bakers Association page states that it is estimated that companies in the industry “lose 30 percent of its reusable plastic trays and spend well over $10 million annually in replacement costs,” and says the association passed laws in Maryland in 2013 and in Texas in 2019 (ABA on tray theft). Identification helps only alongside permanent ownership marking, covered in our guide to molded-in and hot stamp logos.
Building the business case
Build it from your own numbers, in the same structure for each option:
- Per-tray cost: labels and relabeling, or tags and attachment.
- Infrastructure: scanners, portals and installation at each read point.
- Software and integration: linking reads to your warehouse and pool systems, including de-duplicating RFID reads.
- Measured benefit: reduction in trays lost per year times replacement cost, plus any reduction in pool size from shorter, better-measured cycles (pool size follows dispatch rate times cycle time).
- Proof before scale: a pilot at one DC with measured read or scan rates and before-and-after loss data.
Run the pilot at the node where losses are highest; if the data there does not change a decision, a wider rollout is unlikely to.