Blow Molding & Hollow Plastic Products worked example

Mold Changeover Cost at 72% changeover cost allocation share: a worked example in blow molding & hollow plastic products

This worked example runs the mold changeover cost numbers for a tougher week than the baseline: 72% changeover cost allocation share instead of the typical 100%. Estimate blow molding mold changeover cost from changeover hours, labor and machine cost rate, allocation share, and fixed setup adders.

The inputs for this scenario

  • Mold changeover hours: 4.5 hours (held at the documented default)
  • Blended changeover cost rate: 185 $ / hour (held at the documented default)
  • Changeover cost allocation share: 72 % (the input this scenario stresses; the baseline uses 100)
  • Fixed startup and tooling cost: 650 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Allocated variable changeover cost = mold changeover hours × blended changeover cost rate × changeover cost allocation share.
  • Total mold changeover cost works out to 1,249 $ at these inputs, and this is the headline figure for the scenario.
  • Blended changeover cost rate works out to 278 $ / hr at these inputs.
  • Allocated variable changeover cost works out to 599 $ at these inputs.
  • Fixed startup and tooling cost works out to 650 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where changeover cost allocation share sits at 100% and the headline result is 1,483 $, this scenario comes in 15.72% below the baseline at 1,249 $.
  • Use it when quoting short runs, sizing minimum economic batches, or building a business case for faster tooling changes. 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 mold changeover cost: 1,249 $ (headline result)
  • Blended changeover cost rate: 278 $ / hr
  • Allocated variable changeover cost: 599 $
  • Fixed startup and tooling cost: 650 $

Run it with your numbers

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

Last reviewed 2026-05-12.