EV & Battery Manufacturing worked example

EV Launch Ramp Attainment Rate at 65% target ramp attainment for the phase: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop target ramp attainment for the phase to 65%, then walk the calculation through step by step. Calculate launch ramp attainment from actual good vehicles or packs built, planned ramp quantity, and target attainment.

The inputs for this scenario

  • Actual good launch builds completed: 820 vehicles/packs (held at the documented default)
  • Planned launch builds scheduled: 1,000 vehicles/packs (held at the documented default)
  • Target ramp attainment for the phase: 65 % (the input this scenario stresses; the baseline uses 90)

Working through the calculation

  • The calculation starts from the formula this tool documents: Launch ramp attainment = actual good launch builds รท planned launch builds.
  • Launch ramp attainment works out to 82 % ramp attainment at these inputs, and this is the headline figure for the scenario.
  • Ramp attainment gap works out to -17 points at these inputs.
  • Actual good builds works out to 820 vehicles/packs at these inputs.
  • Planned launch builds works out to 1,000 vehicles/packs at these inputs.

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.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to target ramp attainment for the phase, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. 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

  • To rerun this with your own numbers, open the live EV Launch Ramp Attainment Rate calculator, set target ramp attainment for the phase to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.