Mine planners build pit phase sequences and production schedules using deterministic cutoff grades and fixed commodity price assumptions that are set annually and rarely stress-tested mid-year. When copper or gold prices move 15 to 20%, the economic cutoff grade changes, marginal stockpile material classifications shift, and the optimal pit phase sequence may no longer reflect the highest NPV path - but re-running the schedule takes a planning team several weeks. Geotechnical constraints, processing capacity limits, and equipment availability are modeled as fixed inputs rather than ranges, creating false precision in the schedule that operations cannot achieve.
Built For
Senior Mine Planner developing short-term and medium-term production schedules at a large open pit gold-copper operation with multiple active phases
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Mine Planner / Operations
Evaluates pit phase sequencing, cutoff grade sensitivity, and stockpile blending strategies across commodity price and cost scenarios.
Mine Geologist / Grade Control
Provides geological and geotechnical constraints that bound the achievable phase sequences and bench designs.
Process / Plant Engineer
Provides processing capacity constraints and recovery function inputs that translate mine schedule ore tonnes into metal production forecasts.
Lumina connects pit sequencing decisions to commodity price scenarios, cutoff grade sensitivity curves, geotechnical constraints, and processing capacity inputs, enabling structured scenario comparison and stockpile blending strategy evaluation without requiring a full schedule rebuild for each scenario.
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I see a consistent -12% variance between Block Model estimates and Plant Recovery for material from Pit B. This suggests high dilution during blasting.
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