Confidence Adjusted Impact per Effort Calculator
What impact-per-effort score follows from my own confidence scale? Check the formula, a worked example and the stated measurement limits.
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Estimated impact (impact units) | Enter estimated impact in impact units. Use the measurement basis described below. |
| Confidence weight (%) | Enter percentage units: 80 means 80%, not 0.8. |
| Comparable effort (effort units) | Enter comparable effort in effort units. Use the measurement basis described below. |
Understanding your result
Use the result to discuss assumptions and test how rankings change when confidence or effort changes. Keep must-do dependencies outside a purely score-based ranking.
Common mistakes
- A subjective confidence weight is not a p-value.
- A project omitted from an effort estimate can make the score look better without improving its value.
Check your calculation
- Use the worked example as a known reference case, then change one input at a time and check the direction and units of the response.
Choose a consistent measurement basis
Define impact and effort units before comparing options. Confidence is a weight assigned by your team; it is not automatically a statistical confidence level.
A second independently worked case
Zero modeled impact gives score zero. Inputs: Estimated impact: 0 impact units; Confidence weight: 100 %; Comparable effort: 5 effort units. Results: Weighted impact per effort: 0 score.
Precision and output units
Displayed results: Weighted impact per effort in score, rounded to 3 decimal places. Display rounding does not establish the precision of the original measurements or estimates.
Calculation checks, sources and review limits
What impact-per-effort score follows from my own confidence scale?
What impact-per-effort score follows from my own confidence scale? Check the formula, a worked example and the stated measurement limits.
Common uses
- What impact-per-effort score follows from my own confidence scale
- Compare Confidence Adjusted Impact per Effort across scenarios under matching definitions.
How it works
Multiply your impact estimate by a confidence weight and divide by comparable positive effort. This is a user-defined scoring convention, not a validated forecast or the full RICE method.
Worked example
50 × 0.60 ÷ 10 = 3. Enter estimated impact 50 impact units, confidence weight 60 %, comparable effort 10 effort units. The independently worked result is weighted impact per effort 3 score. Compare this example with your reporting definitions before substituting your own figures.
FAQ
Is this the full RICE framework?
No. This user-defined impact/confidence/effort score has no reach input. Use it only when that scoring convention fits the comparison and the scales are consistent.
Does a confidence weight of 60% mean a 60% chance of profit?
No. The weight does not calibrate a probability or a monetary outcome. Document how the team assigns it and test how plausible alternative weights change the ranking.