Apr 5 2026
9 min read
April 14, 2026
10 min read
ALL
MANUFACTURING
FACTORY FLOOR
Learn what an andon board is, how it works in lean manufacturing, and how digital signage modernizes the andon system for real-time production floor visibility.
Explore Pickcel Manufacturing →
Walk into any Toyota-method factory and you will see stacks of signal lights mounted above the production lines. These are andon boards, and for decades they have been the standard tool for communicating line status across a manufacturing floor. As factories grow more complex and data-driven, the three-color light system shows its limits. This guide explains what andon boards are, how they work, where they fall short, and how digital signage now fills that gap.
An andon board is a visual status indicator used on manufacturing production lines to communicate real-time operational conditions to workers and supervisors.
The word “andon” comes from the Japanese term for a paper lantern used as a light signal. Toyota adapted this concept in the 1950s as part of the Toyota Production System (TPS), building andon into the principle of jidoka: the idea that any worker has the authority and responsibility to stop a production line when a defect or problem is detected. This was a significant departure from traditional mass production, where stopping a line was treated as a costly last resort.
A traditional andon board consists of a stacked light unit positioned above a production line, visible from across the floor. The standard three-color system works as follows:
Green: The line is running normally
Yellow: A worker has flagged a concern; a supervisor should respond
Red: The line has stopped; immediate intervention required
Some boards include an audible signal or a numbered display to identify which workstation triggered the alert. The purpose is straightforward: make problems visible the instant they occur so the right person can respond within seconds.
An andon board works by linking a physical trigger (a cord, button, or sensor) to a visual display, so that any production anomaly is immediately communicated to everyone on the floor.
The standard andon workflow in a lean manufacturing environment follows these steps:
A worker notices a defect, a quality issue, or a machine malfunction at their station
The worker pulls the andon cord or presses the andon button
The andon board changes from green to yellow at that station
A team leader or supervisor responds within a defined window (typically 30–60 seconds)
If the problem is resolved within the response window, production continues; if not, the line stops (red)
The team resolves the issue, resets the andon, and production resumes
The andon concept is central to what lean practitioners call “stopping to fix” — accepting a short production pause to address a problem rather than allowing defects to pass downstream where they become far more expensive to resolve.
Traditional andon boards are effective for single-line status signaling, but they struggle to scale with modern manufacturing complexity.
A three-color light tells you a problem exists. It does not tell you what the problem is, how long it has been active, or whether the same pattern occurred last week. Supervisors must walk to the station for any real diagnosis.
Traditional andon boards leave no record. Shift managers have no audit trail of incidents, response times, or resolutions. Root cause analysis depends on manual logs that are frequently incomplete.
In plants with high ceilings, long production halls, or multiple buildings, a supervisor cannot monitor dozens of light stacks simultaneously. There is no central monitoring view.
A physical andon light cannot pull data from a SCADA system, MES, or ERP platform. Production context — cycle time, OEE, yield by shift — lives in separate systems, entirely disconnected from the andon alert.
In dusty or high-vibration manufacturing environments, physical light assemblies require regular replacement and inspection. A failed andon light is a gap in the visual management system.
Digital signage replaces the traditional andon board by connecting to existing production systems and displaying real-time line status, alerts, and performance data on high-brightness screens positioned across the factory floor.
Where a traditional andon board shows a single state (green, yellow, or red), a digital andon display can show:
This transforms the andon concept from a single-state signal into a full operational intelligence layer for the factory floor.
Pickcel enables this by connecting to SCADA and PLC data sources via on-premise integrations, requiring no internet connection for data transfer within the plant network. For more on how this integration works, see Pickcel’s guide to on-premise SCADA and PLC digital signage integration.
Plants applying just-in-time principles will find that digital andon systems tighten the feedback loop between the production line and the people responsible for keeping it running. Read more about digital signage for just-in-time manufacturing.
Pickcel connects to your SCADA and PLC systems to deliver real-time production data on every screen. No custom development required.
A digital andon system delivers more operational value than traditional andon boards across five dimensions:
One screen in a control room or office displays the live status of every production line across the facility. Supervisors monitor the entire floor without walking it constantly.
Digital systems trigger alerts automatically when cycle time exceeds target, OEE drops below minimum, or a machine fault signal comes from the PLC. Response no longer depends solely on a worker pulling a cord.
Every alert, response, and resolution is logged automatically. Production managers can analyze shift-level patterns, identify repeat failure stations, and build fact-based root cause reports without manual record-keeping.
Pickcel's digital signage software integrates with SCADA, MES, and ERP systems. Trusted by 9,000+ businesses across 150,000+ screens in 70+ countries, with on-premise and cloud options to match your network architecture.
Screens can be added to new lines, repositioned, or reprogrammed without re-cabling signal light assemblies. Template changes push to all screens instantly from the Pickcel dashboard. Pickcel's manufacturing digital signage software is designed for multi-line and multi-building operations.
Setting up a digital andon board with Pickcel takes three steps:
Connect your data source
Pickcel integrates with SCADA, PLC, MES, and database sources via on-premise agents that operate within your plant network. No production data leaves the facility. Setup requires network access to the data source and installation of the Pickcel on-premise connector.
Build your andon display template
Use Pickcel's browser-based content editor to design the andon display. Choose which metrics appear: line status indicators, OEE gauges, active alert lists, shift production targets. Pickcel provides manufacturing display templates you can customize to match your floor layout — no coding required.
Deploy and publish
Pair Pickcel-compatible player devices with screens positioned above or beside each production line. Assign the andon template from the Pickcel dashboard and publish. Changes to the template or threshold logic push instantly to all deployed screens. Pickcel supports over 50 device types — most installations are operational within one working day.
If you are building a new factory floor communication system or updating an older one, Pickcel’s digital signage software is the right starting point for manufacturing teams.
An andon board is a visual display system used in manufacturing to communicate the real-time status of a production line. Traditional andon boards use stacked signal lights in three colors: green (running normally), yellow (attention needed), and red (line stopped). The andon concept originated in Toyota’s Production System in the 1950s as part of jidoka — the principle that any worker can stop a production line when a defect or problem is detected. Modern digital andon systems replace physical light stacks with screen-based dashboards displaying live data from SCADA, PLC, and MES systems, including OEE, cycle time, alert history, and shift performance metrics.
“Andon” is a Japanese word that originally referred to a paper lantern used for illumination. Toyota adopted the term in its Production System to describe a visual signaling mechanism on the manufacturing floor that communicates line status to workers and supervisors. When a worker pulls an andon cord, they activate a signal that alerts the team to a problem and triggers an immediate supervisory response. The andon system is one of the foundational tools of lean manufacturing, built on the philosophy that problems must be made visible the moment they occur so they can be resolved before they compound and cause greater production loss.
A digital andon board connects to a factory’s production systems (PLCs, SCADA platforms, MES, or databases) and displays real-time line status, operational metrics, and active alerts on screens positioned on or above the production line. When an alert is triggered by a worker action or an automated threshold breach, the screen updates immediately to show the alert type, the affected station, and the time elapsed since the alert was raised. Unlike traditional light stacks, digital andon boards log every alert and response automatically, can show multi-line status from one screen, and support remote monitoring from a control room or office without requiring physical presence on the floor.
An andon board is an action-oriented status signal. Its primary function is to immediately communicate a problem on the production line and trigger a supervisory response. A production dashboard is broader, typically displaying KPIs, historical trends, shift summaries, and performance data across the full operation. In practice, modern digital andon systems combine both functions: they provide the real-time alert signaling of a traditional andon board alongside OEE metrics and shift performance data on a single screen. The distinction between andon board and production dashboard is narrowing as digital systems replace physical light stacks on the factory floor.
Yes. Digital signage can fully replace traditional andon light stacks and in most cases delivers substantially greater value. A digital andon system provides the same real-time status signaling as a physical andon board, while adding data logging, centralized multi-line visibility, SCADA and PLC integration, automated threshold alerts, and flexible template customization. For manufacturers committed to lean manufacturing principles, a digital andon system aligns closely with the original intent of the andon concept: making problems visible the instant they occur and enabling fast, informed response. Pickcel’s manufacturing digital signage software supports these integrations out of the box, with no custom development required.
Pickcel connects to your SCADA, PLC, and MES systems to deliver live production data on every screen. 9,000+ businesses. 150,000+ screens. 70+ countries.
Apr 5 2026
9 min read
Apr 5 2026
8 min read
Nov 5 2025
8 min read
Oct 17 2024
8 min read
Take complete control of what you show on your digital signage & how you show it.
Start Free Trial Schedule My Demo