THE NUMBERS, EXPLAINED
How to use this calculator.
Target levels are supplied rather than statistically optimized; no outstanding purchase orders or inter-van transfers are included.
Start with your inputs
Enter van stock after recent usage by part, target replenishment levels by part, supplier pack sizes by part. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Van stock after recent usage by part | 3,8 |
| Target replenishment levels by part | 10,20 |
| Supplier pack sizes by part | 4,6 |
A worked example
With the example inputs above, units short of target by part is 7, 12. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Units short of target by part | 7, 12 |
| Order packs by part | 2, 2 |
| Resulting van stock by part | 11, 20 |
How this is calculated
Units short of target by part
Compare available van stock with each target.
Order packs by part
Round positive shortfalls to supplier packs.
Resulting van stock by part
Add ordered pack contents to current stock.
Symbols and units
- a
- Van stock after recent usage by part
- b
- Target replenishment levels by part
- c
- Supplier pack sizes by part
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
Target levels are supplied rather than statistically optimized; no outstanding purchase orders or inter-van transfers are included.
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?
Units short of target by part; Order packs by part; Resulting van stock by part. 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: Target levels are supplied rather than statistically optimized; no outstanding purchase orders or inter-van transfers are included.
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 →