Production Ramp, Scale-Up & Launch Readiness worked example

Yield Ramp Curve at 68% target first-pass yield for this ramp stage: a worked example

This worked example runs the yield ramp curve numbers for a tougher week than the baseline: 68% target first-pass yield for this ramp stage instead of the typical 95%. Estimate yield ramp curve for production ramp, scale-up and launch readiness using production-ready inputs so teams can track KPI performance and decide whether corrective action is needed.

The inputs for this scenario

  • Good units at current ramp checkpoint: 8 count (held at the documented default)
  • Total units started at this checkpoint: 250 count (held at the documented default)
  • Target first-pass yield for this ramp stage: 68 % (the input this scenario stresses; the baseline uses 95)

Working through the calculation

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

How this compares with the baseline

  • Against the tool's baseline example, where target first-pass yield for this ramp stage sits at 95% and the headline result is 3.2 %, this scenario lands almost exactly on the baseline at 3.2 %.
  • Use it at every ramp gate review to decide whether yield is trending toward target fast enough to increase build volume. 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

  • Yield ramp curve rate: 3.2 % (headline result)
  • Yield ramp curve gap to target: 64.8 points
  • Yield ramp curve count: 8 count
  • Total yield ramp curve population: 250 count

Run it with your numbers

  • To rerun this with your own numbers, open the live Yield Ramp Curve calculator, set target first-pass yield for this ramp stage to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.