Meaning
Physical loss or damage to materials occurs naturally during the setup and execution of manufacturing runs. While a production line is designed for efficiency, component attrition accounts for parts lost in the feeder or discarded during the initial calibration of the machine. Manufacturers include a percentage of extra stock in every order to cover these expected losses.
Scrap Allowance
Estimating the volume of wasted parts requires an analysis of historical yield data from similar production batches. High levels of component attrition on a new product line often indicate that the feeder settings or nozzle selections are incorrect. When actual loss exceeds the planned allowance, the line may stop prematurely due to a shortage of a single part.
Process Stability
Refinement of the assembly sequence reduces the rate at which parts are damaged during the manufacturing cycle. Identifying the specific machine module causing the highest component attrition allows engineers to perform targeted maintenance. Regular cleaning of the vacuum filters and calibration of the feeder pitch are standard methods for lowering waste.
Yield Calculation
Subtracting the total number of scrapped parts from the initial inventory provides the net production yield. Persistent high loss rates represent a direct drain on the gross margin of the finished product.
