Test the assumption.
Keep the evidence.

Use non-sensitive example inputs. The calculations run locally in your browser, with visible formulas and downloadable scenarios.

WORKING PLANNING MODELS

Four tools. Four different questions.

These tools support discussion; they do not operate equipment, issue quotations or validate a project.

Translate ore, grade and yields into contained, recovered and refined-equivalent copper.

Test a recovery change while keeping the throughput, grade and units visible.

Separate wet tonnes, dry tonnes, payable metal and hypothetical charges.

Make the missing technical, infrastructure and stakeholder evidence visible.

MODEL DISCIPLINE

01 / BASIS

Metric tonnes, pounds, dry mass and wet mass are not interchangeable. Confirm the reporting basis before comparison.

02 / EVIDENCE

A precise calculation does not validate a grade, recovery, contract term, permit or operating forecast.

03 / REVIEW

Use technical, commercial and project specialists for decisions that require site-specific evidence or contractual interpretation.