THE NUMBERS, EXPLAINED
How to use this calculator.
Weeks are listed in chronological order, all incoming reviews are due within their week and oldest backlog is cleared first.
Start with your inputs
Enter renewals needing review by week, review minutes per renewal, account managers available by week, renewal-review hours per manager-week, opening overdue renewal reviews. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Renewals needing review by week | 20,30 |
| Review minutes per renewal | 30 |
| Account managers available by week | 2,2 |
| Renewal-review hours per manager-week | 5 |
| Opening overdue renewal reviews | 5 |
A worked example
With the example inputs above, review capacity by week is 20, 20. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Review capacity by week | 20, 20 |
| Required review workload by week (hours) | 10, 15 |
| Ending overdue backlog by week | 5, 15 |
How this is calculated
Review capacity by week
Convert manager review hours to complete review capacity.
Required review workload by week (hours)
Price incoming renewals in review time.
Ending overdue backlog by week
Carry uncompleted reviews forward after using each week capacity.
Symbols and units
- a
- Renewals needing review by week
- b
- Review minutes per renewal
- c
- Account managers available by week
- d
- Renewal-review hours per manager-week
- e
- Opening overdue renewal reviews
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
Weeks are listed in chronological order, all incoming reviews are due within their week and oldest backlog is cleared first.
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?
Review capacity by week; Required review workload by week (hours); Ending overdue backlog by week. 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: Weeks are listed in chronological order, all incoming reviews are due within their week and oldest backlog is cleared first.
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: Describe and Identify Cost Drivers ↗
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 →