THE NUMBERS, EXPLAINED
How to use this calculator.
Homogeneous orders and interchangeable labour; excludes separate equipment bottlenecks and arrival timing within slot.
Start with your inputs
Enter average lines per collection order, pick time per line (minutes), packing time per order (minutes), pickers assigned to slot, slot duration (minutes), orders already assigned. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Average lines per collection order | 20 |
| Pick time per line (minutes) | 0.5 |
| Packing time per order (minutes) | 5 |
| Pickers assigned to slot | 3 |
| Slot duration (minutes) | 60 |
| Orders already assigned | 10 |
A worked example
With the example inputs above, labour per order (minutes) is 15. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Labour per order (minutes) | 15 |
| Whole-order slot capacity | 12 |
| Additional orders available | 2 |
| Overbooked orders | 0 |
How this is calculated
Labour per order (minutes)
Add line picking time and fixed packing time.
Whole-order slot capacity
Divide total picker-minutes by order labour.
Additional orders available
Subtract booked orders from capacity.
Overbooked orders
Report orders beyond modeled slot capacity.
Symbols and units
- a
- Average lines per collection order
- b
- Pick time per line (minutes)
- c
- Packing time per order (minutes)
- d
- Pickers assigned to slot
- e
- Slot duration (minutes)
- f
- Orders already assigned
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
Homogeneous orders and interchangeable labour; excludes separate equipment bottlenecks and arrival timing within slot.
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?
Labour per order (minutes); Whole-order slot capacity; Additional orders available; Overbooked orders. 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: Homogeneous orders and interchangeable labour; excludes separate equipment bottlenecks and arrival timing within slot.
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 →