Portfolio demonstration · illustrative assumptions
The model changed. Did the decision change with it?
Decision Delta is a review sheet, not a dashboard. It isolates the revised assumptions, traces the economic movement, and asks whether the conclusion moved enough to change the next action.
Model review sheet · v1 to v2
One model. Two versions. One decision threshold.
Illustrative screen thresholds: 1.30x DSCR and 15% simplified equity IRR.
01 · What changed
| Assumption | Version 1 | Version 2 |
|---|---|---|
| PPA tariff | 8.80 c/kWh | 8.20 c/kWh |
| Net yield | 120 GWh | 118 GWh |
| CAPEX | US$60.0m | US$58.0m |
| Annual OPEX | US$2.5m | US$2.6m |
| Debt rate | 8.0% | 8.5% |
| Tenor / gearing | 15y / 70% | 15y / 70% |
02 · What moved economically
DSCR delta-
Equity IRR delta-
Conclusion-
| Output | Version 1 | Version 2 |
|---|---|---|
| Revenue | - | - |
| Simplified CFADS | - | - |
| DSCR | - | - |
| Simplified equity IRR | - | - |
| Screen conclusion | - | - |
03 · Which changes drove value
Decision insight
Track the conclusion, not just the changed cells.
What I would ask next
The example is synthetic. The driver bars show sequential effects on simplified equity NPV at the 15% discount threshold, so order matters. A real Decision Delta uses the actual model structure, version history, debt sculpting, tax, reserves, contracts and source evidence.
Method
Every revision should answer three questions.
- What changed? Assumptions, financing terms, contracts, timing or data source.
- What moved economically? Revenue, CFADS, coverage, debt capacity, NPV and returns.
- Did the decision change? Proceed, negotiate, resize, defer or reject.
Ongoing decision support
Need this applied every time the live model or term sheet moves?
Decision Delta support keeps the economics, issue list and conclusion aligned across versions.