Graphite, Anode & Battery Materials Processing worked example

Rework Cost at 54% share of flagged material that is reworkable: a worked example in graphite, anode & battery materials processing

This worked example runs the rework cost numbers for a tougher week than the baseline: 54% share of flagged material that is reworkable instead of the typical 75%. Estimate rework cost for off-spec graphite or anode material using rework kg, rework cost per kg, reworkable share, and fixed testing or setup cost.

The inputs for this scenario

  • Off-spec anode material flagged for rework: 600 kg (held at the documented default)
  • Rework processing cost per kg: 3.8 $ / kg (held at the documented default)
  • Share of flagged material that is reworkable: 54 % (the input this scenario stresses; the baseline uses 75)
  • Fixed rework setup and changeover cost: 500 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Variable rework cost = off-spec material for rework × rework cost per kg × reworkable material share.
  • Total rework cost works out to 1,731 $ at these inputs, and this is the headline figure for the scenario.
  • Rework cost per kg reviewed works out to 2.89 $ / piece at these inputs.
  • Variable rework cost works out to 1,231 $ at these inputs.
  • Fixed rework setup cost works out to 500 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where share of flagged material that is reworkable sits at 75% and the headline result is 2,210 $, this scenario comes in 21.67% below the baseline at 1,731 $.
  • Use it on a rework-versus-scrap decision for a flagged lot, or to budget rework spend across a batch of off-spec material. 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 rework cost: 1,731 $ (headline result)
  • Rework cost per kg reviewed: 2.89 $ / piece
  • Variable rework cost: 1,231 $
  • Fixed rework setup cost: 500 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Rework Cost calculator, set share of flagged material that is reworkable to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.