EV & Battery Manufacturing worked example

Battery Line Changeover Loss Cost at 110% share of lost output attributed to changeover: a worked example

What does the result look like when share of lost output attributed to changeover reaches 110%? The full calculation is worked below with real intermediate numbers. a battery production manager needs to compare changeover frequency, batch size, and model-mix decisions

The inputs for this scenario

  • Lost battery production units during changeover: 160 units (unchanged)
  • Contribution loss per missed battery unit: 95 $ / unit (unchanged)
  • Share of lost output attributed to changeover: 110 % (raised for this scenario; the documented default is 100)
  • Fixed changeover setup and validation cost: 4,200 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Variable changeover loss = lost units × loss cost per unit × changeover loss share) to the inputs above produces each figure below.
  • At this operating point the engine returns 20,920 $ for total battery changeover loss, the number this scenario is built around.
  • At this operating point the engine returns 131 $ / lost unit for loss per lost unit.
  • At this operating point the engine returns 16,720 $ for variable lost-output cost.
  • At this operating point the engine returns 4,200 $ for fixed changeover setup cost.

How this compares with the baseline

  • Against the tool's baseline example, where share of lost output attributed to changeover sits at 100% and the headline result is 19,400 $, this scenario comes in 7.84% above the baseline at 20,920 $.
  • A figure at this level is achievable when share of lost output attributed to changeover is genuinely sustained, not just peaked for a shift. It treats the loss share as a flat capture rate; in reality the first units after a changeover often run at reduced yield, so true loss can exceed the variable figure shown.

Results at a glance

  • Total battery changeover loss: 20,920 $ (headline result)
  • Loss per lost unit: 131 $ / lost unit
  • Variable lost-output cost: 16,720 $
  • Fixed changeover setup cost: 4,200 $

Run it with your numbers

  • Every input above is editable in the live Battery Line Changeover Loss Cost calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.