Separate completed effort from the revised remainder
The synthetic plan estimated ten forms at thirty minutes each. Four were completed in three actual hours. The team’s supplied revised assumption is forty-five minutes for each of the remaining six; it is a planning input, not a rate measured for every future form.
| Portion | Units | Effort |
|---|---|---|
| Original full plan | 10 | 5 hours |
| Completed actual | 4 | 3 hours spent |
| Remaining revised | 6 | 6 × 45 minutes = 4.5 hours |
Update the finish from remaining work
- Retain actual completed effort
- Count six remaining forms
- Apply supplied revised assumption
- Allocate 4.5 remaining hours
- Record revised total forecast
Do not apply the new rate backwards to rewrite the three actual hours already recorded.
Forecast total effort is 7.5 hours, comprising actual three and forecast 4.5. The original five-hour estimate remains in history so the change is explainable. A revised forecast is still an estimate, not a delivery guarantee.
How much does the total effort forecast exceed the original estimate?
Show the worked answer
2.5 hours: 3 + 4.5 − 5. Remaining work alone is 4.5 hours.