- Sample quality is more important than sample quantity. - One poor sample can misclassify thousands of tonnes. - High-grade ore deserves closer drilling spacing. - Always validate laboratory results before updating the model. - Control dilution at the mining face—it cannot be recovered later. - Keep ore and waste physically separated at all stages. - Reconcile every mining bench and production period. - Update the geological model continuously as new information becomes available. - Use digital tools (GPS, drones, fleet management, block models) to improve precision. - Aim for reconciliation of 95–105%, dilution below project targets, and the lowest practical ore loss. - If grade control is poor, even an excellent resource model will not deliver expected project value. - Good grade control increases revenue, extends mine life, reduces processing costs, and improves investor confidence.