Foundry & Forging worked example
Casting Weight Variation with highest casting weight measured of 12 lb: a worked example
This worked example runs the casting weight variation numbers for a tougher week than the baseline: highest casting weight measured of 12 lb instead of the typical 24.8 lb. Compare casting weight spread against nominal casting weight to monitor process variation.
The inputs for this scenario
- Highest casting weight measured: 12 lb (the input this scenario stresses; the baseline uses 24.8)
- Lowest casting weight measured: 23.9 lb (held at the documented default)
- Nominal casting weight: 24.2 lb (held at the documented default)
Working through the calculation
- The calculation starts from the formula this tool documents: Casting Weight Variation range = highest casting weight measured - lowest casting weight measured.
- Casting Weight Variation spread works out to 49.17 % at these inputs, and this is the headline figure for the scenario.
- Spread works out to 11.9 value at these inputs.
- Minimum works out to 12 value at these inputs.
- Maximum works out to 23.9 value at these inputs.
How this compares with the baseline
- Against the tool's baseline example, where highest casting weight measured sits at 24.8 lb and the headline result is 0 %, this scenario lands almost exactly on the baseline at 49.17 %.
- Use it on a sampling cadence during a run to catch process drift early, or when investigating a yield or dimensional complaint. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.
Results at a glance
- Casting Weight Variation spread: 49.17 % (headline result)
- Spread: 11.9 value
- Minimum: 12 value
- Maximum: 23.9 value
Run it with your numbers
- To rerun this with your own numbers, open the live Casting Weight Variation calculator, set highest casting weight measured to your actual value, and adjust the remaining inputs to match your operation.
Last reviewed 2026-05-12.