EV & Battery Manufacturing worked example

EV Final Assembly Line Capacity at 99% final assembly uptime: a worked example

What does the result look like when final assembly uptime reaches 99%? The full calculation is worked below with real intermediate numbers. an EV plant needs to check whether final assembly can support a daily build target after downtime and quality losses

The inputs for this scenario

  • Vehicles completed per line cycle: 1 vehicles/cycle (unchanged)
  • Available final assembly cycles: 520 cycles (unchanged)
  • Final assembly uptime: 99 % (raised for this scenario; the documented default is 88)
  • Vehicle first-pass yield: 94 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross scheduled vehicle capacity = vehicles per line cycle × available final assembly cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 484 vehicles for good ev line capacity, the number this scenario is built around.
  • At this operating point the engine returns 520 vehicles for gross scheduled vehicle capacity.
  • At this operating point the engine returns 5.2 vehicles for vehicles lost to downtime.
  • At this operating point the engine returns 30.89 vehicles for vehicles lost to first-pass defects.

How this compares with the baseline

  • Against the tool's baseline example, where final assembly uptime sits at 88% and the headline result is 430 vehicles, this scenario comes in 12.5% above the baseline at 484 vehicles.
  • A figure at this level is achievable when final assembly uptime is genuinely sustained, not just peaked for a shift. It applies single average uptime and yield figures, so it will not capture how a specific bottleneck station or a yield-killing defect mode behaves; use station-level data for root-cause work.

Results at a glance

  • Good EV line capacity: 484 vehicles (headline result)
  • Gross scheduled vehicle capacity: 520 vehicles
  • Vehicles lost to downtime: 5.2 vehicles
  • Vehicles lost to first-pass defects: 30.89 vehicles

Run it with your numbers

  • Every input above is editable in the live EV Final Assembly Line Capacity calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.