Grade control is a fundamental aspect of mine operations that ensures the accurate extraction of ore at the desired quality and grade. It involves continuous sampling, data analysis, and decision-making to distinguish ore from waste, preventing dilution and maximizing profitability. The process starts with geological mapping and sampling from blast holes or drill cores, followed by laboratory analysis and statistical interpretation. Accurate grade control helps determine the boundaries of economic ore zones and guides excavation to maintain consistent feed for the processing plant. Modern grade control employs digital mine models, geostatistical estimation, and real-time data integration to enhance decision accuracy. These tools help reduce resource loss, optimize milling operations, and ensure that mine plans align with market and production targets. Effective grade control not only safeguards revenue but also supports sustainable resource utilization by minimizing unnecessary extraction and waste generation. Source: Dominy, S. C., Noppe, M. A., & Annels, A. E. (2002). Errors and Uncertainty in Mineral Resource and Ore Reserve Estimation: The Importance of Getting It Right. Exploration and Mining Geology, 11(1–4), 77–98.