![MiningMath approach. Not need of pre-defined cut-off grades.](https://miningmath.com/wp-content/uploads/2021/12/unnamed-1024x1024.jpg)
The end of cut-off grades as we know?
The cut-off grade is the concentration of a mineral or metal required to classify materials as either ore or waste. Materials with a concentration above the cut-off are classified as ore, while anything below is classified as waste.