Production Ramp, Scale-Up & Launch Readiness worked example

Yield Ramp Curve at 99% target first-pass yield for this ramp stage: a worked example

What does the result look like when target first-pass yield for this ramp stage reaches 99%? The full calculation is worked below with real intermediate numbers. Use it when yield ramp curve in production ramp, scale-up and launch readiness needs a clean rate and gap-to-target you can put on a tier board.

The inputs for this scenario

  • Good units at current ramp checkpoint: 8 count (unchanged)
  • Total units started at this checkpoint: 250 count (unchanged)
  • Target first-pass yield for this ramp stage: 99 % (raised for this scenario; the documented default is 95)

Working through the calculation

  • Applying the documented formula (Yield ramp curve rate = yield ramp curve count ÷ total yield ramp curve population × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 3.2 % for yield ramp curve rate, the number this scenario is built around.
  • At this operating point the engine returns 95.8 points for yield ramp curve gap to target.
  • At this operating point the engine returns 8 count for yield ramp curve count.
  • At this operating point the engine returns 250 count for total yield ramp curve population.

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 %.
  • A figure at this level is achievable when target first-pass yield for this ramp stage is genuinely sustained, not just peaked for a shift. A single checkpoint is one point on a curve; one reading cannot tell you the learning slope, so track it across several builds before drawing conclusions.

Results at a glance

  • Yield ramp curve rate: 3.2 % (headline result)
  • Yield ramp curve gap to target: 95.8 points
  • Yield ramp curve count: 8 count
  • Total yield ramp curve population: 250 count

Run it with your numbers

  • Every input above is editable in the live Yield Ramp Curve calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.