Meaning
A pre-defined operational threshold or trigger that requires operators to halt a manufacturing line immediately to prevent defect propagation or safety hazards. Establishing a line stop condition empowers floor workers to stop assembly when they observe a serious quality deviation or an unsafe situation. This immediate halt protects both the product integrity and employee well-being.
Trigger Classification
Specific triggers include repetitive assembly defects and machine calibration failures. These criteria are documented on the shop floor to ensure consistency in decision-making. When any of these parameters are met, the operator pulls an andon cord or presses a button to cease operations.
Downtime Mitigation
Halting production leads to immediate corrective action by engineering and quality teams to resolve the root cause of the issue quickly. This collaborative response limits the duration of the shutdown and prevents the creation of a large backlog of defective items that would otherwise require extensive sorting. The line restarts only after the condition is resolved, documented, and verified by a quality supervisor.
Process Health
Enforcing these stop rules provides data on system reliability and identifies chronic mechanical weaknesses that require preventive maintenance. Frequent stops indicate a need for process redesign or worker training. This practice maintains a high standard of quality.