Expose the assumptions that drive the result
A return estimate is conditional on its inputs. Sensitivity analysis changes selected inputs to reveal which assumptions matter most. Use a recorded base case, then test plausible adverse combinations rather than displaying only a favorable result.
Distinguish coin output from its currency valuation. Difficulty and accepted contribution can change output, while price changes the value of that output. Electricity, fees, repairs, and capital cost are separate terms. This is a planning exercise, not a prediction or investment recommendation.
Step-by-step
- Record the base case. State yield basis, coin price and date, power boundary, electricity rate, fee basis, uptime treatment, horizon, and excluded expenses.
- Vary individual inputs. Test lower output, lower valuation, higher tariffs, and downtime separately. Avoid applying a second uptime discount to already-observed net yield.
- Test combinations. Combine adverse inputs, include site overhead and reserves, and identify when operating margin becomes nonpositive. Keep the entire scenario reproducible.
Worked example
Illustrative example. Hypothetical gross value is USD 10/day, the fee is 2%, and energy is USD 6/day. Operating net before other expenses is USD 3.80/day. A 20% decline in gross value lowers that net to USD 1.84/day.
The gross reduction is 20%, but the operating margin falls much more because the stated energy cost stays fixed. This explains why a small headline change can matter greatly.
Common mistakes
- Changing price and yield together without showing each effect.
- Calling a constant-input annualization a forecast.
- Ignoring scenarios where electricity exceeds revenue.
Questions and answers
Should I report the optimistic case?
You may, with the same clear assumptions and alongside base and adverse cases. Do not let it stand alone as an expected or guaranteed outcome.
Apply this to your setup
Save base and adverse input sets with the full exclusion list. Show changes in output and price as separate drivers, then model combinations. Mark any scenario with nonpositive operating margin. A useful sensitivity result tells you which assumptions would need to change, rather than presenting the most favorable case as an expected income.
Sources and next steps
Use profitability and payback limitations.
How this guide was prepared: AI-generated drafting with the linked technical references and illustrative calculations. It does not report first-hand equipment tests or a named specialist review.