Work
You are 43% done. When does the project actually finish?
Real projects do not progress in a straight line — they ramp up, cruise, and crawl to the finish. Feed in your progress so far and the S-curve fits that natural shape and extends it to 100%, so your finish date accounts for the slow tail everyone underestimates.
Get this in Google Sheets →The model
Six weeks of progress on a project that is 43% done. The S-curve fits the slow-fast-slow trajectory and projects it to completion.
| Progress tracked | 6 weeks |
| Complete so far | 43% |
| Curve | S-shaped (slow-fast-slow) |
| Forecast | → extends to 100% |
What Sortia tells you
Extending your trajectory to 100%:
Done so far43%
S-curve finishSep 21
Straight-line guess~late Aug
The tail costs~3 wks
A naive straight line says late August; the S-curve, which knows the finish slows down, forecasts September 21 — about three weeks later. That gap is exactly the crunch that blindsides projects. Turn on "show all three curves" to bracket the date with an optimistic and pessimistic path. Paste in your own progress history.
Try it in your own sheet
- Open Sortia in Google Sheets and choose Start from a template.
- Pick Will the Project Finish on Time? — the model loads with the inputs filled in.
- Change the assumptions to fit your situation and press Run.