Andon System — From Stack-Light to Live Operational Spine

Walk into a plant with a "traditional" Andon system and you'll see what most people picture: a tri-color stack-light on each station, a paper escalation ladder taped to the supervisor's desk, and an MTTR (mean time to first response) measured in minutes — sometimes tens of minutes.

A modern Andon System is something else entirely. It's the live operational spine that lean manufacturing has needed since Toyota first drew the cord.

What modern Andon actually does

The job has expanded beyond visual signaling. A real Andon system today is responsible for:

• Live downtime tracking at station, line, and plant level — with the cause taxonomy lean teams need.
• Escalation routing that pages the right responder in seconds, with a configurable ladder if no one acks.
• OEE in real time — Availability × Performance × Quality, calculated continuously, not from yesterday's data.
• PLC and MES integration — the machine itself raises the andon, not just an operator pulling a cord.
• Visual management — large-format dashboards on the floor that workforce + leadership see at the same moment.

How MileSoft handles it

The MileSoft Andon System is built for the floor it has to live on:

1. Live alerts with configurable severity + escalation ladders.
2. PLC + MES integration via OPC UA, MQTT, REST. Your existing controllers talk to the andon directly.
3. Live OEE by station, line, shift, and product family.
4. Mobile + large-display dashboards so the same data is visible to the operator at the station and the plant manager in their office.
5. Historical analytics that answer "why did Tuesday's day shift on Line 3 lose 22 minutes?" in three clicks.

The features that quietly make the difference

• Acknowledgement metrics — MTTR-FR (first response) and MTTR-Fix tracked separately, because they're different problems.
• Cause-code taxonomies that match how your lean team actually thinks — not a generic vendor list.
• Integration with Torque Traceability so a quality drift escalates the same way a machine fault does.

Where it fits

Andon is most powerful inside a connected stack:

• ERP for production context — what was being built when the andon fired.
• Torque Traceability and Material Traceability for the high-res context the andon escalates with.
• Inventory Control for the upstream material-availability events that often cause the downtime.

The takeaway

If your andon system is a stack light, you're getting 5% of the value of the methodology. The other 95% lives in the live downtime data, the escalation ladders, and the OEE board on the wall — and that's what a modern Andon system is built to deliver.

Book a demo and we'll walk you through the live OEE dashboard our customers stare at every day.