What actually moves the ROI
one-way sensitivity · base case 2.1× · illustrative
Adoption rate
Build cost
Churn
Price point
Ramp time
Support load
1.1×
2.1× base
3.1×
1.4× → 3.1×
Adoption swings the case ~3× more
than build cost. De-risk it first:
pilot one store before the estimate
debate (feeds the tree in 39).
Even at the worst adoption assumption the case clears 1× — visible because the amber bar stops short of break-even.