RFID Tags for Manufacturing & WIP Tracking

RFID tags for manufacturing: visible WIP, controlled line, reduced scrap

In a production process, work-in-progress disappears. The problem only surfaces when the customer complains, when scrap emerges at final inspection or when the line is stopped because a component that "should be there" is missing. Without RFID traceability, every workstation is a blind spot: you know where a piece started and where it ended, but everything in between is invisible.

Wintag manufactures on-metal RFID tags specific to manufacturing environments: resistant to production process temperatures, compatible with metal surfaces, suitable for permanent attachment to pallets, jigs and semi-finished parts. Integrated into MES and ERP systems, they become the physical node of any production traceability project compliant with Industry 4.0 requirements.

The sectors where we operate most frequently: automotive and components, mechanical workshops and CNC machining, packaging industry, industrial electronics and capital goods manufacturing. Customers who contact us include production, quality and operations managers — and system integrators implementing MES who need to select the right physical tag to integrate into their project.

WIP traceability and Industry 4.0: the line becomes a smart factory asset

Complete visibility of production flow in real time

Every semi-finished part fitted with an RFID tag is automatically identified at each workstation. The MES knows in real time where every piece is, which operation it has undergone and which is the next planned station. Bottlenecks become visible in the data, lead times become measurable, deviations are signalled before they turn into scrap and OEE loss. The direct result is an OEE improvement achieved without changes to the machines, but through visibility of the flow.

Lean manufacturing: eliminating search and waiting muda

In lean thinking, time spent searching for a semi-finished part, waiting for station confirmation or redoing an operation already performed is pure muda. RFID traceability makes every piece self-declaring: it arrives at the station already identified, the production log is automatically updated, the MES does not depend on manual entry. Parts the system believes completed but still in process, lots recorded in stock that physically cannot be found: these "production ghosts" disappear because every RFID read is a recorded and verifiable event.

The role of RFID tags in Industry 4.0 projects

In a smart factory context, the RFID tag is the physical contact point between the real world of the semi-finished part and the digital twin of production. Gate readers at every station feed MES KPIs in real time, actual production data matches the management system data, and the production plan becomes an operational tool, not just a forecast.

On-metal tags: the requirement nobody considers before go-live

Why standard tags do not work on pallets, jigs and metal semi-finished parts

A standard RFID tag placed on a metal surface does not work: the metal reflects the electromagnetic field and eliminates readability. Wintag on-metal tags integrate a standoff layer that isolates the inlay from the surface, guaranteeing stable reading in direct contact with steel, aluminium and cast iron — both with fixed gate readers and with handheld terminals in the field.

Resistance to real production processes: painting, cutting, washing

The conditions of a manufacturing line are incompatible with catalogue tags:

• Cataphoretic painting and polymerisation ovens: up to 200°C for extended periods — common requirement in automotive
• Cutting oils and coolants: continuous exposure in mechanical workshops and CNC machining centres
• Industrial washing cycles: alkaline detergents, pressure, temperature up to 80°C
• Vibrations and mechanical impacts: present on moving pallets and process equipment

Wintag selects substrates, encapsulation resins and adhesives verified for the customer's specific process conditions, before any series supply. For extreme thermal processes, solutions certified up to 250°C are available.

Quality control, lot traceability and IATF 16949 compliance

A production log for every part: the RFID production passport

The association between the semi-finished part's RFID tag and the process parameters recorded at every station creates a "production passport" for every piece: date, shift, operator, machine, intermediate inspection result, lot number and serial number. In the event of a downstream non-conformity — or a recall in the automotive sector — traceability enables precise identification of which parts were produced under the same conditions and containment of the potentially affected lot, without blocking the entire production run.

IATF 16949 and ISO 9001: RFID traceability as a compliance tool

IATF 16949 requires product traceability throughout the production process. RFID traceability is not just an operational tool: it is objective, verifiable and immutable evidence that supports second and third-party audits. The RFID log is more reliable than any paper work order or manual entry.

Scrap reduction through early intervention

When a process parameter deviates from the norm, the system signals it at the time, not at end of shift. Corrective action happens before the deviation generates scrap: quality costs fall, line yield improves and yield data is available for SPC (Statistical Process Control) analysis.

Asset management of jigs, fixtures, moulds and CNC tooling

Every tool localised and with automatically updated history

Jigs, fixtures, moulds, tooling: every tool fitted with an RFID tag is locatable in real time and has a usage history automatically updated with every cycle. The system knows how many cycles an injection mould has run, when it is due for maintenance, where it is physically located between departments. Line downtime due to missing or unmaintained tooling becomes a problem of the past.

CNC tooling management: tool life management without spreadsheets

In a mechanical workshop, CNC tools — inserts, mills, drills, taps — have a useful life measured in machined parts or cutting minutes. The RFID tag on the tool automatically updates the usage counter at every tool crib withdrawal. The replacement alert arrives before failure, not after a machining scrap.

Preventive maintenance triggered by cycle count

The cycle count via RFID triggers the maintenance alert before failure, not after. An injection mould reaches the end of its operational life in a planned manner instead of failing in the middle of an urgent production run. The cost of a mould down for scheduled maintenance is always less than for a production failure.

Are you a MES system integrator or an OEM machine builder?

In many manufacturing projects the physical tag is selected by the system integrator implementing the MES — or by the machine builder who must pre-install identification on their equipment before delivery to the end customer. For both, the tag is a critical component: if it does not read correctly on the actual surface of the pallet or semi-finished part in the specific production environment, the MES receives no data and the entire Industry 4.0 traceability project loses value.

• Encoding configured to MES specifications: EPC structure, User Memory and TID defined in agreement with the destination system (Siemens Opcenter, SAP MII, Apriso, Wonderware, others) before production, without additional middleware.
• Pre-installed tags on pallets and jigs for OEM builders: we supply tags already mounted and encoded on equipment, ready for reading at the customer's first line start-up.
• Samples for testing on the actual line: we validate the tag on the specific surface and in the customer's production environment before the series order — including gate reading tests, handheld terminal tests and in the presence of adjacent metal.
• Technical support during integration: we assist the SI in resolving reading problems — range, orientation, antenna, detuning — without deferring to go-live when correction costs are highest.
• Scalable supply: from sample batches for validation up to series supply, with encoding and packaging adapted to the SI's assembly process requirements.

How Wintag works in manufacturing

Wintag typically enters a manufacturing project when the right physical tag must be selected for the line — or when a previously selected tag does not perform as expected on metal, at high temperatures or in the presence of coolants. The standard process involves process analysis, prototype production tested on the real line, and validation before any series order.

• On-metal tags for pallets, jigs and semi-finished parts: integrated standoff layer for stable reading on steel, aluminium and cast iron, including with fixed gate readers.
• Thermal resistance verified for the specific process: solutions from 85°C to 250°C for cataphoretic painting ovens, polymerisation and thermal processes.
• Chemical compatibility with oils, coolants and detergents: materials and adhesives tested for the substances actually present on the customer's line.
• Fixing adapted to the surface and operating cycle: structural adhesive, rivet, threaded insert or embedded depending on asset durability and type.
• Encoding for MES/ERP integration: EPC structure and User Memory defined in agreement with the management system requirements before production.
• Prototypes and reading tests on the actual line: samples to validate in the specific production environment before the series order.

On-metal RFID tags for your line? Tell us about your process →

Frequently asked questions about RFID tags for manufacturing

Why do standard RFID tags not work on metal pallets and jigs?

Metal surfaces reflect the electromagnetic field of RFID systems, making reading of a standard tag in contact impossible. On-metal tags integrate a standoff layer that isolates the inlay from the metal. Wintag selects the inlay and standoff thickness based on the specific surface material (steel, aluminium, cast iron) and the read range required by the portal or handheld terminal.

Do RFID tags withstand the high temperatures of cataphoretic painting and coolants?

It depends on the chosen material. Standard tags do not withstand beyond 70–85°C. Wintag selects substrates and encapsulation resins specific to the process thermal range: solutions up to 200°C for cataphoretic painting and polymerisation ovens (common in automotive) and up to 250°C for extreme thermal processes are available. Compatibility with cutting oils, coolants and alkaline detergents is verified before series supply.

How is the tag encoding integrated with the existing MES system?

Wintag defines the EPC structure in agreement with the MES system integrator before production: the unique tag code is structured in the exact format required by the destination system (Siemens Opcenter, SAP MII, Apriso, others). No additional middleware is required if the structure is correctly defined upstream. We provide pre-encoded samples for the test phase before the series order.

Can the RFID production traceability system support IATF 16949 compliance?

Yes. RFID traceability produces an automatic, immutable and verifiable log for every manufactured part: station, operator, machine, process parameters and intermediate inspection result. This log is direct compliance evidence for the traceability requirement demanded by IATF 16949 and supports second and third-party audits. The RFID system does not replace the QMS, but becomes a reliable data feeder for it.