How RTLS Supports JIT and Sequencing in Manufacturing

Just-in-Time manufacturing is often described as getting the right material to the right place at the right time. In practice, that is easier said than done.

Most factories already have systems that know what should happen. ERP, MES and WMS systems define production orders, material requirements, work instructions, pick lists and delivery schedules. But there is often a missing layer between the digital plan and the physical shop floor: where is the material right now, is it moving, is it at the correct workstation, and is it arriving in the expected order?

That is where a real-time location system can add a new level of operational control.

An RTLS does not only show dots on a map. When combined with geofences, rules, triggers and process context, location data can be used to answer a much more valuable question:

Is the right thing at the right place, at the right time, in the right order?

For Just-in-Time and sequencing processes, that question is critical.

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The problem with JIT without real-time visibility

Many manufacturing operations already run some form of Just-in-Time material delivery. However, without real-time tracking, the process often depends on manual scans, paper-based instructions, operator confirmations, radio calls, visual checks and tribal knowledge.

These methods can work, but they leave blind spots.

A system may know that a kit was picked. It may know that a production order was released. It may even know that material should be at a workstation by a certain time. But between these moments, the physical flow is often invisible.

This creates a familiar set of problems:

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The irony is that many of these workarounds reduce the value of JIT itself. Extra buffers, early deliveries, manual checks and firefighting all add cost, space usage and complexity. Instead of a lean material flow, the factory ends up with “JIT on paper” and extra inventory on the floor. In extreme cases, manufacturers may even resort to emergency measures, such as expediting missing materials by helicopter, just to prevent a line stop.

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JIT in manufacturing: from WIP visibility to material flow

Just-in-Time material delivery is often associated with automotive production, but the same principle applies to many other manufacturing environments. Any factory with work-in-progress, multiple production steps, shared workstations, limited floor space or high product variety can benefit from delivering material closer to the moment it is actually needed.

A good example is AFL, a manufacturer of steel and metal components with a high-mix production environment. In the AFL case study, it is described how the company faced challenges with shop-floor visibility, locating work orders, tracking production status and managing WIP across production stages. Their operation includes more than 60,000 SKUs and a median production run of only 10 units, which makes visibility and prioritization especially important.

In this type of environment, material is often prepared or delivered too early because teams want to avoid shortages later in the process. Before a JIT approach with RTLS, all material for the different production steps could be dropped off at the workstations when the order was released. But if the order only arrived at that workstation days later, the result was too much material on the floor. Material could be moved again, misplaced, mixed with other orders or even repurposed before it was actually needed.

With Pozyx, the WIP order became the trigger for the next logistics step. As the order moves through production and enters a geofence near the next workstation, the system detects that the order is approaching. A rule can then trigger a notification, for example by email, so logistics knows when to deliver the required material just in time.

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Where sequencing enters the picture

In automotive and similar high-volume manufacturing industries, JIT is frequently combined with sequencing, also known as Just-in-Sequence (JIS). In these environments, materials must arrive not only at the right time, but also in the exact order required by the production process.

RTLS helps by adding real-time physical validation to the planned sequence. When a tracked carrier, cart or kit enters a line-side geofence, the system can check whether it is:

• the expected material,
• at the expected workstation,
• within the expected time window,
• and in the expected sequence.

This turns location tracking into process validation. Instead of simply asking “Where is it?”, the system can ask: Is this the correct item for this process step right now?

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What should be tracked?

A common question is whether every kit needs its own tracker. The answer is: not necessarily. There are different levels of tracking, and the right choice depends on the use case, required accuracy and cost model.

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Level 1: Track the tugger, forklift or AGV

The simplest setup is to track the material handling equipment.

This provides visibility into:

• where the tugger or forklift is,
• which routes are being used,
• how long transports take,
• where bottlenecks occur,
• whether vehicles enter or leave certain zones.

This is useful for fleet visibility and transport optimization. However, by itself it does not always prove which material is being carried, unless the load is identified through another method such as barcode, RFID, operator input or system integration.

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Level 2: Track the cart, rack or returnable container

A stronger option for JIT and sequencing is to track the carrier.

This could be a cart, rack, dolly, pallet, tugger train carrier or returnable container. The physical tracker is mounted on the reusable logistics asset, while the platform or integrated business system knows what the carrier currently contains.

For example:

• CART-12 contains KIT-041, KIT-042 and KIT-043.
• Slot 1 is for Assembly Stop 1.
• Slot 2 is for Assembly Stop 2.
• Slot 3 is for Assembly Stop 3.

When the cart moves, Pozyx tracks the cart. The system can then use the digital load manifest to understand what should be delivered where and when.

This approach is often more scalable than tagging every individual kit. It also fits well with returnable containers, racks and carts that move repeatedly through the factory.

Furthermore, accurate cart tracking can also support automated logistics. With UWB-based positioning, carts can be located with approximately 10–30 cm precision, allowing AMRs to know exactly where a cart is positioned and reliably navigate to it for pickup. This enables smoother handovers between manual logistics, tracked carts, and autonomous transport systems.

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Level 3: Track individual kits or high-value items

In some cases, it does make sense to track individual kits, parts or work orders directly.

This is useful when:

• the item is high value,
• item-level traceability is required,
• the process has many manual handovers,
• the cost of a missing item is high,
• or exact physical proof is needed.

This provides the highest level of visibility, but also requires more tags, more tag management and potentially more cost.

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Indirect tracking: avoiding a tracker on every kit

For many operations, the best solution is not to tag every individual item. Instead, companies can use indirect tracking.

The idea is simple: rather than tracking every pallet, kit or container directly, you track the equipment that moves it and identify what is being carried. When a tracked forklift, tugger or AMR picks up a load, the system associates that load with the moving equipment. When it is dropped off, the system updates the load location based on the equipment location.

This concept is explained in more detail in the blog about pallet tracking and scanless operations: Pallet Tracking and How to Achieve a Scanless Operation

The same principle can be applied to JIT and sequencing. If it is too expensive or impractical to place a tracker on every kit, the system can still create visibility by combining:

• tracked forklifts, tuggers or AGVs,
• barcode, RFID or operator-based load identification,
• geofences at pickup and drop-off zones,
• and rules that validate whether the right material was moved to the right place.

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Closing the loop with empty carts

Tracking carts or returnable containers also creates another opportunity: managing the return flow.

After material is delivered and consumed, empty carts can be pushed to a pickup location near the workstation. A geofence can detect when empty carts are available for return. The system can then automatically generate a list of empty carts waiting for pickup and trigger logistics to collect them.

This helps avoid another common problem: returnable containers disappearing into the factory.

This extends the JIT process beyond delivery and creates a closed-loop material flow.

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How the Pozyx Platform supports this

The Pozyx Platform brings the location data, geofences, trackables, dashboards and rule engine together into one operational layer.

In a JIT or sequencing setup, the platform can be used to define:

• trackables, such as tuggers, forklifts, AGVs, carts, racks, containers, kits or WIP orders;
• geofences, such as warehouse zones, pickup zones, traffic points, workstation areas, line-side buffers and empty-cart pickup areas;
• rules, such as “this cart should arrive at this workstation within this time window”;
• triggers, such as “send an email when a WIP order enters this geofence” or “raise an alert when a wrong cart enters this station”;
• dashboards, showing where material is, what is delayed, what is waiting and which exceptions are active.

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The rule and trigger engine makes it possible to turn location events into workflow events.

Examples include:

• When a WIP order enters the pre-workstation geofence, notify logistics.
• When a cart enters the wrong workstation geofence, raise an alert.
• When a required kit has not arrived before the JIT deadline, trigger a late-delivery warning.
• When too many carts are present in a line-side buffer, trigger a congestion warning.
• When an empty cart enters the pickup zone, add it to the return list.
• When material arrives in the wrong sequence, notify the supervisor.

These rules can be configured in the Pozyx platform and can also be integrated with external systems through APIs, webhooks or other interfaces. This means Pozyx does not replace ERP, MES or WMS systems. Instead, it adds the missing physical context to the digital production plan.

From location tracking to flow control

In the end, JIT only works when the physical flow is as reliable as the planning system behind it. ERP, MES, and WMS systems can define what should happen, but they often lack real-time visibility into what is actually happening on the floor. That gap is where delays, wrong deliveries, missed scans, and costly firefighting begin.

By tracking forklifts, tuggers, carts, and returnable containers, manufacturers can connect the planned sequence with the real-world movement of materials. This makes it possible to detect issues earlier, confirm that the right material is moving to the right station, and reduce the need for excessive buffers or manual checks.

The goal is not just to know where things are. The goal is to make JIT more dependable, more visible, and easier to manage before small disruptions turn into line-stopping problems.

If you want to get started, reach out to us for a kit or trial, API documentation and more information: