Your guesses
Put your best guess in the middle. Low and high are how far off it could reasonably be.
| Input | Low | Best | High |
|---|
The answer
Payback
—
First month the running total is back to zero or better
Year one
—
Net after setup, licences and the value of time saved
Running total, month by month
It starts in the red by the setup cost, then each month adds that month's value.
Which number matters most
Each bar is the year-one net with one guess moved to its low and then its high, every other guess left at its best. The longest bar is the guess the answer leans on hardest.
Fix the highlighted guesses to see the ranking.