Rubber, Tires, Foam & Elastomer Manufacturing worked example

Foam Bun Yield at 68% target foam bun yield rate: a worked example

This worked example runs the foam bun yield numbers for a tougher week than the baseline: 68% target foam bun yield rate instead of the typical 95%. Estimate foam bun yield for rubber, tires, foam and elastomer manufacturing using production-ready inputs so teams can track KPI performance and decide whether corrective action is needed.

The inputs for this scenario

  • Rejected or defective foam buns: 8 count (held at the documented default)
  • Total foam buns produced: 250 count (held at the documented default)
  • Target foam bun yield rate: 68 % (the input this scenario stresses; the baseline uses 95)

Working through the calculation

  • The calculation starts from the formula this tool documents: Foam bun yield rate = foam bun yield count ÷ total foam bun yield population × 100.
  • Foam bun yield rate works out to 3.2 % at these inputs, and this is the headline figure for the scenario.
  • Foam bun yield gap to target works out to 64.8 points at these inputs.
  • Foam bun yield count works out to 8 count at these inputs.
  • Total foam bun yield population works out to 250 count at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target foam bun yield rate sits at 95% and the headline result is 3.2 %, this scenario lands almost exactly on the baseline at 3.2 %.
  • Use it when reviewing a shift's foam pour records, trending yield after a formulation change, or reporting quality against a plant target. 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

  • Foam bun yield rate: 3.2 % (headline result)
  • Foam bun yield gap to target: 64.8 points
  • Foam bun yield count: 8 count
  • Total foam bun yield population: 250 count

Run it with your numbers

  • To rerun this with your own numbers, open the live Foam Bun Yield calculator, set target foam bun yield rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.