EV & Battery Manufacturing worked example

EV Launch Ramp Attainment Rate at 99% target ramp attainment for the phase: a worked example

What does the result look like when target ramp attainment for the phase reaches 99%? The full calculation is worked below with real intermediate numbers. an EV startup or automotive launch team needs to measure weekly ramp progress against the approved build plan

The inputs for this scenario

  • Actual good launch builds completed: 820 vehicles/packs (unchanged)
  • Planned launch builds scheduled: 1,000 vehicles/packs (unchanged)
  • Target ramp attainment for the phase: 99 % (raised for this scenario; the documented default is 90)

Working through the calculation

  • Applying the documented formula (Launch ramp attainment = actual good launch builds รท planned launch builds) to the inputs above produces each figure below.
  • At this operating point the engine returns 82 % ramp attainment for launch ramp attainment, the number this scenario is built around.
  • At this operating point the engine returns 17 points for ramp attainment gap.
  • At this operating point the engine returns 820 vehicles/packs for actual good builds.
  • At this operating point the engine returns 1,000 vehicles/packs for planned launch builds.

How this compares with the baseline

  • Against the tool's baseline example, where target ramp attainment for the phase sits at 90% and the headline result is 82 % ramp attainment, this scenario lands almost exactly on the baseline at 82 % ramp attainment.
  • A figure at this level is achievable when target ramp attainment for the phase is genuinely sustained, not just peaked for a shift. Attainment alone hides the cause; a high rate built on rework-heavy units can still mask quality problems that will surface downstream.

Results at a glance

  • Launch ramp attainment: 82 % ramp attainment (headline result)
  • Ramp attainment gap: 17 points
  • Actual good builds: 820 vehicles/packs
  • Planned launch builds: 1,000 vehicles/packs

Run it with your numbers

  • Every input above is editable in the live EV Launch Ramp Attainment Rate calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.