EV & Battery Manufacturing worked example

Battery Line Changeover Loss Cost at 72% share of lost output attributed to changeover: a worked example

This worked example runs the battery line changeover loss cost numbers for a tougher week than the baseline: 72% share of lost output attributed to changeover instead of the typical 100%. Estimate cost of battery line changeovers from lost units, contribution per unit, affected share, and fixed setup cost.

The inputs for this scenario

  • Lost battery production units during changeover: 160 units (held at the documented default)
  • Contribution loss per missed battery unit: 95 $ / unit (held at the documented default)
  • Share of lost output attributed to changeover: 72 % (the input this scenario stresses; the baseline uses 100)
  • Fixed changeover setup and validation cost: 4,200 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Variable changeover loss = lost units × loss cost per unit × changeover loss share.
  • Total battery changeover loss works out to 15,144 $ at these inputs, and this is the headline figure for the scenario.
  • Loss per lost unit works out to 94.65 $ / lost unit at these inputs.
  • Variable lost-output cost works out to 10,944 $ at these inputs.
  • Fixed changeover setup cost works out to 4,200 $ at these inputs.

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 21.94% below the baseline at 15,144 $.
  • Use it when sizing production batches, building a SMED or quick-changeover business case, or quoting the cost of adding a new pack variant to an existing line. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Total battery changeover loss: 15,144 $ (headline result)
  • Loss per lost unit: 94.65 $ / lost unit
  • Variable lost-output cost: 10,944 $
  • Fixed changeover setup cost: 4,200 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Battery Line Changeover Loss Cost calculator, set share of lost output attributed to changeover to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.