The unit of work is a cargo, not a lead
A pipeline stage that ends at signature is the wrong shape
Most CRMs assume the interesting part of the relationship finishes when the contract is signed. In bulk mineral export that is roughly the halfway point. After signature there is a laycan to hit, a rake programme to feed the port, a draft survey, a load-port certificate of analysis, a provisional invoice, a voyage, a discharge-port assay, a variance, and only then a final invoice that may differ from the provisional one by more than the trading margin. A system that closes the record at “won” leaves every commercially significant event afterwards in email.
Know what is genuinely free to sell
Grade at a mine is not uniform, and the tonnage a trader can honestly offer is whatever is on the stockpile minus what is already committed against open contracts. When those commitments live in separate spreadsheets it is entirely normal for two people to offer the same lot in the same week, and the second buyer finds out at nomination. Holding the lot, its declared grade, its tonnage and the cargo it is committed to on one record makes the free balance something you can look up rather than something you reconstruct.