Foundry & Forging worked example

Pattern Cost Amortization at 72% pattern cost allocation share: a worked example

This worked example runs the pattern cost amortization numbers for a tougher week than the baseline: 72% pattern cost allocation share instead of the typical 100%. Allocate pattern, core box, matchplate, tooling, or gating-revision cost across castings.

The inputs for this scenario

  • Castings covered by pattern cost: 5,000 castings (held at the documented default)
  • Tooling cost spread per covered casting: 2.4 $ / casting (held at the documented default)
  • Pattern cost allocation share: 72 % (the input this scenario stresses; the baseline uses 100)
  • Fixed pattern engineering cost: 3,200 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Total pattern cost amortization = castings covered by pattern cost × pattern cost per covered casting × pattern cost allocation + fixed pattern engineering cost.
  • Total pattern cost amortization works out to 11,840 $ at these inputs, and this is the headline figure for the scenario.
  • Pattern cost per casting works out to 2.37 $ / piece at these inputs.
  • Variable pattern cost amortization works out to 8,640 $ at these inputs.
  • Fixed pattern engineering cost works out to 3,200 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where pattern cost allocation share sits at 100% and the headline result is 15,200 $, this scenario comes in 22.11% below the baseline at 11,840 $.
  • Use it when quoting a new tooled part, setting amortization volume, or deciding between bundling tooling into piece price versus a separate NRE charge. 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 pattern cost amortization: 11,840 $ (headline result)
  • Pattern cost per casting: 2.37 $ / piece
  • Variable pattern cost amortization: 8,640 $
  • Fixed pattern engineering cost: 3,200 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Pattern Cost Amortization calculator, set pattern cost allocation share to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.