Quantify production waste from offcuts, machining chips, saw kerf, rejected parts, trimming and other metal losses. Get total scrap, waste percentage and usable production yield.
How do I calculate metal scrap percentage? Add all measured production waste categories, divide the total by starting raw material and multiply by 100.
What is production waste? Production waste is material that leaves the manufacturing process without becoming accepted finished product.
Should machining chips be included? Yes. Chips are material removed during machining and can be included when calculating physical material waste.
Should saw kerf be included? Yes, when the kerf represents material removed from the starting stock and is being tracked as part of the production loss.
Are rejected parts scrap? Rejected parts can be counted as production scrap if their material does not become accepted finished output.
What is the difference between scrap rate and utilization? Scrap rate focuses on the percentage of starting material classified as waste. Utilization focuses on the percentage retained as usable output. In a simple mass balance, they complement each other.
What is a normal metal waste percentage? There is no single normal percentage. It varies substantially by material, geometry, cutting method, machining process, tolerances and production volume.
Can scrap still be valuable? Yes. Waste for manufacturing-yield purposes can still have recycling or resale value, especially when metal grades are kept separated.