THE NUMBERS, EXPLAINED
How to use this calculator.
Fixing quantities must come from an approved assembly specification; this worksheet only calculates procurement quantities.
Start with your inputs
Enter assembly joints by type, specified fixings per joint by type, fixings per supplier pack by type, existing fixings by type. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Assembly joints by type | 10,20 |
| Specified fixings per joint by type | 4,2 |
| Fixings per supplier pack by type | 25,30 |
| Existing fixings by type | 5,0 |
A worked example
With the example inputs above, required fixings by type is 40, 40. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Required fixings by type | 40, 40 |
| Purchase packs by type | 2, 2 |
| Stock after assembly by type | 15, 20 |
How this is calculated
Required fixings by type
Multiply joint counts by specified fixings per joint.
Purchase packs by type
Deduct stock and round each fixing type to whole packs.
Stock after assembly by type
Reconcile opening inventory, purchased packs and usage.
Symbols and units
- a
- Assembly joints by type
- b
- Specified fixings per joint by type
- c
- Fixings per supplier pack by type
- d
- Existing fixings by type
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
Fixing quantities must come from an approved assembly specification; this worksheet only calculates procurement quantities.
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?
Required fixings by type; Purchase packs by type; Stock after assembly by type. 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: Fixing quantities must come from an approved assembly specification; this worksheet only calculates procurement quantities.
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 →