A Tale of Two Warehouses: Why Yard Visibility Matters
Two fictional DCs with the same docks, labor, and systems, over one Tuesday. See how seeing the yard changes gate waits, trailer searches, mis-shipments, and detention.
Warehouse A and Warehouse B are fictional composites. They are not real customers, and the numbers in the scorecard are illustrative.
The two buildings are the same. They’re in the same kind of industrial park, with the same footprint, the same number of docks, the same labor, and the same WMS and TMS. Both started Tuesday with the same freight plan. The difference is that Warehouse B can see its yard.
Here’s how that played out over one day.
(This is the story version of our analytical piece, How poor yard visibility breaks your supply chain performance.)
Key takeaways
- Two sites with the same buildings, docks, labor, and systems can have very different days, depending on whether they can see the yard.
- Small yard delays (a gate wait, a trailer search, a missed check) show up hours later as late shipments, mis-shipments, and detention.
6:00 a.m.: trucks arrive
Warehouse A. The first drop-trailer carrier of the day pulls up behind eight live-load trucks. The guard works the line one truck at a time. For each one she writes the driver, carrier, trailer number, and time on a paper sheet, then radios the dock to confirm what’s expected. The drop-trailer driver only needs to leave one trailer and take another, and he waits 45 to 60 minutes just to get in.
The guard isn’t slow. The whole gate depends on one person and one sheet of paper.
Warehouse B. Drivers pre-registered the night before. As each truck approaches, cameras read the truck and trailer, match them to the appointment, and the arm goes up. The drop-trailer driver is through before the live-load trucks have finished lining up. The guard, if there is one, handles exceptions instead of data entry.
9:00 a.m.: the hot load
Warehouse A. A customer calls because a load needs to ship two hours early. The record says the trailer is in lane 14. It isn’t, because the previous shift moved it. A yard driver spends 40 minutes driving the rows and reading the numbers on trailer doors. The load goes out late anyway, and the customer notices.
Warehouse B. Same call, same load. The yard driver’s mobile inventory unit (MIU), mounted on the yard truck, shows where the trailer was last recorded. The move is assigned in seconds, and the trailer is on its way to the door before the customer is off the phone.
Noon: the wrong trailer
Warehouse A. Two trailers from the same carrier are parked a few spots apart, and their numbers are close. A driver is sent for one and hooks the other. At the gate, the guard sees a carrier, a driver, a trailer, and a sheet. Nothing prompts a second look, so the truck leaves.
Nobody finds out until the customer calls to ask where their freight is. After that comes the tracing, the re-send, and the apology.
Warehouse B. The exit read compares the trailer that’s leaving with the one that was released. The mismatch is flagged before the truck leaves the property, and the guard and dispatcher sort it out in a few minutes.
3:00 p.m.: the detention bill
Warehouse A. The dispatcher gets an email from a carrier: three trailers have been sitting past free time, and detention charges are coming. Nobody knew. The trailers had been parked in the back lanes since morning, and the record said “staged.” There’s no timestamped record to check the charge against, so Warehouse A will probably pay it.
Warehouse B. Aging alerts flagged the same three trailers before free time ran out. The yard team moved them first, and the charges never started.
End of day: the scorecard
Illustrative composite. Not customer data.
| Measure | Warehouse A | Warehouse B |
| Lane time (arrival to entering gate) | 45 to 60 minutes for the late carrier | A few minutes |
| Trailer search time (hot load) | About 40 minutes | Seconds |
| Mis-shipments | 1, found by the customer | 0, caught at the exit |
| Detention | Trailers past free time, found on the bill | Moved before free time ended |
| Staff hours | Spent on sheets, searches, and manual counts | Redirected to moves and exceptions |
What actually changed
None of Warehouse A’s systems failed. Its WMS and TMS did their jobs with the information they had, but that information came from a paper sheet, a radio, and the last walk of the yard, so it was always a little late. Warehouse B added a layer that shows what’s happening in the yard right now. It’s a system of reality that runs alongside the systems of record, and it doesn’t replace them.
Warehouse B also doesn’t get this for free. Someone has to pre-register appointments, set up the gate, and get through about four weeks of calibration before the numbers settle. It’s a real project, just a short one.
Which warehouse is yours?
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Frequently asked questions
- What does yard visibility change for a distribution center?
It shortens gate waits and cuts trailer search time. It also catches mis-shipments before they leave and flags trailers before they run past free time. It does this by giving every system and every shift the same current view of the yard. - What is a mobile inventory unit (MIU)?
An MIU mounts on vehicles that already drive through the yard, like yard trucks, and records what’s parked where as they go. Your yard inventory stays current without anyone walking it. - Does yard visibility replace a YMS, WMS, or TMS?
No. Aviro360 works alongside the systems your site already runs. It shows what’s happening in the yard so those systems have current information. - How long does it take to deploy?
Aviro360 gate installs typically take two to three days, with a soft launch by day five, using your existing cameras and gate arms. Mobile inventory units can go live the same day. Full calibration takes about four weeks.
