Automated Inspection Hold Triggers in Surface Mount Lines
Automated inspection hold triggers halt surface mount lines on consecutive statistical defects, preventing costly scrap propagation and hidden interconnect failure.
Line Stoppage Cost
Production Loss
Manufacturing efficiency is disrupted whenever an assembly line stops due to equipment failure or material shortages. In a high-volume PCB shop, line stoppage cost represents the total financial burden of idle resources and missed delivery targets. This figure includes the hourly wages of the operators and the lost margin on unproduced units.
A single hour of downtime can reach thousands of dollars in a sophisticated facility.
Overhead Absorption
Fixed expenses continue to accumulate even when the machines are not placing components. When a bottleneck occurs, line stoppage cost increases because the factory cannot absorb the overhead of power, rent, and depreciation. Unplanned maintenance is the most common cause of these interruptions.
Every minute spent clearing a board jam or waiting for a component feeder reduces the return on investment for the entire line. Supply chain delays also contribute to these losses if the correct parts are not available at the start of a shift.
Quality Consequence
Restarting a line often introduces a period of instability where the first few boards may be defective. These secondary losses are added to the initial line stoppage cost as part of the total incident impact. Predictive maintenance and buffer stocks are used to minimize the frequency of these events.