Rotational Molding worked example
Mold Capacity Per Shift at 65% machine uptime: a worked example
This worked example runs the mold capacity per shift numbers for a tougher week than the baseline: 65% machine uptime instead of the typical 90%. Mold Capacity Per Shift estimates how many good parts a rotomolding machine can actually deliver in a shift, not just in theory.
The inputs for this scenario
- Good parts per oven cycle: 4 units / cycle (held at the documented default)
- Available oven cycles per shift: 480 cycles (held at the documented default)
- Machine uptime: 65 % (the input this scenario stresses; the baseline uses 90)
- First-pass yield: 97 % (held at the documented default)
Working through the calculation
- The calculation starts from the formula this tool documents: Gross mold capacity per shift capacity = units per cycle × available cycles.
- Good output capacity works out to 1,211 units at these inputs, and this is the headline figure for the scenario.
- Gross capacity works out to 1,920 units at these inputs.
- Uptime loss works out to 672 units at these inputs.
- Yield loss works out to 37.44 units at these inputs.
How this compares with the baseline
- Against the tool's baseline example, where machine uptime sits at 90% and the headline result is 1,676 units, this scenario comes in 27.78% below the baseline at 1,211 units.
- Use it when building a shift schedule or committing a delivery date for a rotomolded part. 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
- Good output capacity: 1,211 units (headline result)
- Gross capacity: 1,920 units
- Uptime loss: 672 units
- Yield loss: 37.44 units
Run it with your numbers
- To rerun this with your own numbers, open the live Mold Capacity Per Shift calculator, set machine uptime to your actual value, and adjust the remaining inputs to match your operation.
Last reviewed 2026-05-12.