The models also contain a block of editable variables we call Efficiency Factors. These allow the user to change mine labor and mill labor productivities, diesel, electricity and consumables usage, plus adjustments for drilling conditions in open pit mines and ground conditions for underground operations. At the mill, users can now change the ore work index. The ability to change these efficiency factors now allows the user to adjust for most discrepancies between the model assumptions and the actual conditions at the mine.

About the only thing you can't change in the editable models is the flowsheet, which remains fixed according to the assumptions we have built into the model for the particular operation. Our credit policy on corrections to onsite mining and milling costs remains the same for the numbers as supplied in the model.

The ability to change key model variables allows users to test mine economics against different price and production scenarios and dramatically increases the flexibility of the models. But if you don't need or want the edit facilities, you can always download a half-price non-editable version of the model using our standard assumptions. These non-editable models come without the model formulas and are normally projected only to the current year or next year. The non-editable, no formulas models cost about half price, and users who download the no-formulas version can always upgrade to the editable model for the price difference.