Andon

Andon is a visual management method and part of the Toyota Production System. In Japanese, the term “Andon” means (paper) lamp. With classic traffic lights and monitors (“boards”) in production, the Andon method forms a visual control system for the production status.

Bild eines Werkers und Andon Boards

Image: Example of an Andon board

What is Andon?

The Andon method encompasses both the visualization of the status of a machine or process and the ability for employees to change this status.

The original form of Andon can now be found in many places, even outside of production. They are ubiquitous not only on machines in manufacturing, but also on self-service checkouts and deposit machines: simple stacked traffic lights with the colors red, yellow, and green that clearly indicate the current status.

Warnings, errors, and malfunctions can be viewed remotely by staff, and the location of the malfunction is immediately clear. The self-explanatory color coding also clearly indicates the problem category as reaching a warning or intervention limit.

In addition to the ubiquitous traffic light lamps, other forms of the Andon method have also been developed. Today, there are Andon boards, which can range from simple counters to elaborate dashboards, and various devices for workers to report status, known as Andon cords.

Andon boards

The Andon board is a visual control device used in manufacturing. In its simplest form, it can display only the current number of units or the status of the line. More advanced versions display any status information about the respective production line or manufacturing process. As part of the Selfbits Manufacturing Suite, our customers use the display for OEE, current production progress, and current production figures and quality data.
The data for the display is collected automatically via machine data collection or manually by employees via production data collection and aggregated and displayed in near real time.

Andon-Cord

The Andon cord is another tool for recording the current status. As the name suggests, there may be pull cords on a production line, for example, that enable an employee to report an error or difficulty so that they can receive assistance. Similarly, an Andon cord can also be designed as an emergency stop switch, in the form of a pull cord or an actual switch. This enables the employee to initiate a conveyor or plant shutdown in the event of problems. Here, the use of Andon cords also directly records the location of the problem through the report itself. This reduces the need for inquiries and enables a quick response.

Summary

Features

  • Visualization of the operating status of a machine/production line
  • Reporting a discrepancy in order to remedy the situation
  • Stop the production plant in case of danger and stop the further flow of substandard products.

Advantages

  • Improved transparency – Immediate availability of information increases transparency
  • Improved productivity – With immediate visibility of problems, they can be resolved more quickly.
  • Increased flexibility – With Andon, workers can take on more responsibility because the current status is transparent.
  • Increased plant availability – With Andon, faults can be identified and rectified more quickly.
  • Save time and money – Andon is a simple method for exchanging information on the shop floor.