THE NUMBERS, EXPLAINED
How to use this calculator.
Categories are disjoint and each alert receives the entered mean review duration; outcome assessment is supplied externally.
Start with your inputs
Enter false-positive alerts by category (counts), true-positive alerts by category (counts), review minutes per alert by category (minutes). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| False-positive alerts by category (counts) | 10,20 |
| True-positive alerts by category (counts) | 5,5 |
| Review minutes per alert by category (minutes) | 2,3 |
A worked example
With the example inputs above, false-positive review time (minutes) is 80. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| False-positive review time (minutes) | 80 |
| False-positive share of review time (%) | 76.190476 |
How this is calculated
False-positive review time (minutes)
Multiply false positives by review time per category, then sum.
False-positive share of review time (%)
Divide false-positive review time by all review time.
Symbols and units
- a
- False-positive alerts by category (counts)
- b
- True-positive alerts by category (counts)
- c
- Review minutes per alert by category (minutes)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions and limits
Categories are disjoint and each alert receives the entered mean review duration; outcome assessment is supplied externally.
Calculations use the values you enter. Blank or invalid inputs show an error instead of silently substituting zero. Results are displayed to useful precision; calculations retain the underlying numeric precision.
Questions about this tool
What does the result tell me?
False-positive review time (minutes); False-positive share of review time (%). The result applies to the method and inputs described above. Check the units and assumptions before using it in a decision.
Why might another calculator differ?
Differences in units, rounding, timing or model definitions can produce different answers. Compare the input definitions and the method, rather than only the final number. For this tool: Categories are disjoint and each alert receives the entered mean review duration; outcome assessment is supplied externally.
Are my inputs stored or sent to AI?
Calculations on this page happen in your browser. The separate AI question finder sends its submitted conversation to OpenAI; these calculator fields are not sent. Favourites and recent tool names are stored locally. A shared link contains the inputs you choose to include.
Further reading
OpenStax Prealgebra 2e — arithmetic and proportions ↗
Background reading; this does not imply endorsement or independent review of SumFizz.
Review status
Software example and browser checks are recorded in our quality report. No external expert review is claimed. Created with coding assistance; calculations run as ordinary browser code.
Read the quality report →