Rubber, Tires, Foam & Elastomer Manufacturing worked example

Mixing Batch Yield at 68% target batch acceptance rate: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop target batch acceptance rate to 68%, then walk the calculation through step by step. Estimate mixing batch 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

  • Off-spec mixing batches: 8 count (held at the documented default)
  • Total mixing batches produced: 250 count (held at the documented default)
  • Target batch acceptance rate: 68 % (the input this scenario stresses; the baseline uses 95)

Working through the calculation

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

How this compares with the baseline

  • Against the tool's baseline example, where target batch acceptance rate sits at 95% and the headline result is 3.2 %, this scenario lands almost exactly on the baseline at 3.2 %.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to target batch acceptance rate, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. With the default preset the 'count' is treated as the numerator directly, so make sure you feed it the metric you actually want as a percentage — off-spec count yields a defect rate, not an acceptance rate.

Results at a glance

  • Mixing batch yield rate: 3.2 % (headline result)
  • Mixing batch yield gap to target: 64.8 points
  • Mixing batch yield count: 8 count
  • Total mixing batch yield population: 250 count

Run it with your numbers

  • To rerun this with your own numbers, open the live Mixing Batch Yield calculator, set target batch acceptance rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.