The rack at station 14 must be the right rack.
Just-in-sequence RTLS and RFID so the rack at station 14 is the right rack. Custody plus a time window — sequence integrity on the line you already run.
JIS fails when the sequence is perfect in MES and wrong on the lineside.
Broadcast vs physical truth
A JIS broadcast that does not match the rack in the buffer only accelerates the wrong part. RFID/RTLS has to close the loop at the dock and the lineside, not only in the telegram.
Buffer discipline
Without a measured max/min on the lineside supermarket, teams over-buffer just in case and erase the sequencing benefit.
Colour change and late edits
Late order edits break static sequences. Design exception handling before you promise zero mis-builds.
Just-in-sequence delivery: how it works, and what it protects.
The right radio for the job — chosen, never sold — mapped to your use case. That is what makes the ROI fast.
1 · Sequence
The build order drives a sequenced pick and delivery from the supermarket.
2 · Verify
RFID/UWB confirms the right part reaches the right station in the right order.
3 · Prevent
Out-of-sequence or wrong parts are flagged before they reach the operator.
Passive RFID → part verify · UWB → station sequence
Which technology actually fits.
Paid only by you. Hardware stays on the vendor’s paper.
Passive RFID
Part identity & sequence.
UWB
Line-side position.
Integration
MES sequence checks.
Industries this solution suits
The right part, in build order, every time.
An assembly plant drives a sequenced pick from the supermarket; RFID/UWB confirms each part reaches the right station in order. Out-of-sequence parts are flagged before they reach the operator — mis-builds stop.
Typically bought by: Production / logistics planners, line leaders, quality, MES owners.
Relevant case studies
Where this solution wins — examples by sector.
Automotive JIS supply (automotive)
Sequenced supply to assembly line with verified kit content.
Aerospace JIS for tier-1 assembly (aerospace)
Sequenced assembly with verified component.
Electronics SMT changeover (manufacturing)
Sequenced SMT changeover material kits.
Heavy-machinery configuration (manufacturing)
Multi-week configured-machine sequence.
Pharma packaging sequence (pharma)
Multi-SKU campaign sequencing in pharma packaging.
Who needs this kind of programme.
Automotive OEMs and tier suppliers protecting build order, rack identity and dock-to-line timing.
JIS / JIT logistics providers who lose margin when the wrong sequence hits the line.
Quality and launch teams needing mis-build prevention evidence, not after-the-fact scrap reports.
What buyers compare in this market.
Hardware shortlists usually mix Impinj/Zebra RAIN portals at docks and line-side with UWB/RTLS (Ubisense, Sewio) for in-plant rack movement. Pure barcode JIS fails under labour pressure; pure RTLS without sequence validation still ships the wrong rack. The advisory choice is where identity must be definitive (portal read) versus where continuous location is enough to stage.
Why JIS locating fails.
Tag the rack, ignore the sequence logic. Location without a sequence engine still builds the wrong car.
Dock portals tuned once. Metal, stretch-wrap and seasonal humidity destroy read rates unless RF is owned as a process.
Supplier yard blind. In-plant perfection with an opaque inbound yard just moves the shortage upstream.
Independent. Vendor-neutral.
TRACIO sells neither RFID readers nor sequencing software. We scope the identity events that must be perfect, the RF design that keeps them perfect, and the MES/WMS hooks that stop a mis-sequence before torque tools fire.
Frequently asked questions
What is the difference between JIT and just-in-sequence?
JIT delivers the right parts at the right time; just-in-sequence (JIS) also delivers them in the exact build order. RTLS and RFID verify sequence and location so the wrong part never reaches the line.
How does tracking prevent sequence errors?
Tags confirm each part or container's identity and position at every handoff, alerting before a mis-sequenced unit reaches the operator - protecting takt time and quality.
Does it integrate with our MES and supplier EDI?
Yes - sequence events tie into your MES and supplier schedules so call-offs, line-side stock and traceability stay aligned end to end.
What accuracy and technology are needed?
Line-side and dock work often needs zone-to-lane accuracy - RFID portals plus UWB where precise position matters - validated by a survey of the metal-rich plant environment.
What is the payback?
Fewer line stoppages and rework from wrong-part or wrong-order errors, less expediting, and cleaner traceability - high value in automotive and complex assembly.
Last updated: 13 September 2026