A single ROI number invites a single objection — “what if your adoption number is wrong?” Sensitivity analysis pre-empts that by running thousands of simulations across the input distributions and reporting confidence bands.Documentation Index
Fetch the complete documentation index at: https://docs.flowx.ai/llms.txt
Use this file to discover all available pages before exploring further.
What gets simulated
Each ROI input has a distribution, not a point value. The defaults Observatory ships with:| Input | Distribution | Why |
|---|---|---|
| Volume | Normal, ±20% | Adoption typically lands within 20% of forecast. |
| Manual hours per case | Normal, ±15% | Real measurements vary; 15% covers the noise. |
| LLM cost per call | Normal, ±10% | Provider pricing and prompt tuning swing it. |
| Replacement ratio | Beta(α=8, β=2) | Centred high, with a long tail toward partial replacement. |
| Discount rate | Triangular(0.07, 0.10, 0.13) | Treasury-tied, but uncertain. |
What the analysis produces
Each Monte Carlo run produces:- p10 / p50 / p90 for monthly savings, payback, annual ROI, and NPV
- A tornado chart showing which inputs drive the most variance
- A histogram of NPV outcomes
- “Base case (p50) NPV is $4.6M”
- “There’s a 90% chance NPV is above $2.9M”
- “There’s a 10% chance NPV is above $6.1M”
Running an analysis
Confirm or adjust input distributions
The defaults are reasonable starting points. For mature deployments with measured variance, tighten them.
Pick the iteration count
1,000 iterations is enough for most use cases. 10,000 for board-grade reports. Anything beyond is overkill.
Reading the tornado
The tornado chart sorts inputs by how much variance they contribute to NPV. Typical result for a mature agent:- Volume — usually dominates
- Replacement ratio — second largest
- Manual hours per case — meaningful
- LLM cost — surprisingly small (cost is small vs savings)
- Discount rate — minor
When to present this
Quarterly business reviews
Pair the p50 with the p10–p90 band. Discuss what’s driving the spread.
Investment committee
A 90% confidence floor that’s still positive is the strongest case you can make.
Post-mortems on miss
When actuals come in below p50, the tornado tells you which assumption was wrong.
Pre-implementation sign-off
Show the p10 — if the worst case is unacceptable, scope or delay.
Related resources
Financial ROI
The point-estimate calculation sensitivity builds on.
Value Outcome Units
Sensitivity bands also apply at the VOU level.

