A car assembler installs an Andon cord that stops the line when a defect is found. Which lean tool is this?

5S is a methodology focused on organizing the workplace to enhance efficiency and effectiveness. It involves five steps: Sort, Set in order, Shine, Standardize, and Sustain. While it contributes to a clean and organized environment, it does not directly relate to stopping the production line for defects, which is the essence of Jidoka.

Kanban is a scheduling system designed to manage and improve work across human systems. It visually indicates when to produce or replenish items based on demand. While Kanban enhances workflow and limits overproduction, it does not involve stopping the line for quality issues, which distinguishes it from Jidoka.

Heijunka is the practice of leveling production to balance workload and reduce waste. It aims to create a smoother workflow by distributing production evenly over time. Although Heijunka is crucial for maintaining efficiency, it does not address the immediate halt of production due to defects, a key feature of Jidoka.