Scratchpad
CAT 777 availability sensitivity — MineCost and Enterprise Finance.
Create an experiment from this budget. Increase CAT 777 mechanical availability by 5% relative to its current value across the plan. Run the full MineCost model, then Enterprise Finance, and compare both with the baseline. Keep all other assumptions unchanged.
I’ll create CAT777_Availability_Plus5 and check the CAT 777 equipment, roster links and period settings.
A 5% relative increase means current availability × 1.05. For example, 80% becomes 84%, an increase of 4 percentage points. This is not a five-percentage-point increase.
I’ll check whether the availability inputs are shared with other equipment before proposing the change. Values above 100% need to be resolved before calculation.
Proposed change · CAT 777 availability
New value: current value × 1.05
Periods: whole plan
Destination: experiment only
The live proposal would list the exact records and old/new values. Shared roster inputs must be isolated if needed to keep other fleets unchanged.
After you apply the reviewed change, I’ll run the experiment through the full MineCost calculation.
When MineCost completes successfully, I’ll run Enterprise Finance using the experiment’s updated costs and capital, with the same financial assumptions as the baseline.
I’ll check that the baseline results are current before reporting the differences.
Calculation sequence
Check fleet requirements, operating hours, labour, maintenance, capital and operating costs; then royalties, tax, cash flow and NPV.
The completed runs would populate the comparison below. No savings or valuation uplift is assumed: higher availability can affect fleet requirements and costs differently under different fleet and manning rules.
| Output | Baseline | Experiment | Δ |
|---|---|---|---|
| CAT 777 fleet required, by period | — | — | — |
| Operator labour cost | — | — | — |
| Total operating cost | — | — | — |
| Fleet capital expenditure | — | — | — |
| MineCost pre-tax NPV | — | — | — |
| Royalties and income tax | — | — | — |
| After-tax free cash flow | — | — | — |
| Enterprise Finance after-tax NPV | — | — | — |
A live response would state currency, reporting period, price deck and discount rate alongside the calculated values.