Precast Concrete & Modular Construction Manufacturing worked example

Mold Changeover Cost at 58% value-added time during changeover: a worked example in precast concrete & modular construction manufacturing

This worked example runs the mold changeover cost numbers for a tougher week than the baseline: 58% value-added time during changeover instead of the typical 80%. Estimates the cost of mold and form changeovers in a precast yard from changeover count, crew cost, and productive-time share.

The inputs for this scenario

  • Mold changeovers in the period: 24 changeovers (held at the documented default)
  • Labor cost per mold changeover: 650 $/changeover (held at the documented default)
  • Value-added time during changeover: 58 % (the input this scenario stresses; the baseline uses 80)
  • Form prep & tooling cost: 900 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Changeover cost $ = changeovers x labor cost per changeover x productive time% + form prep tooling.
  • Total mold changeover cost works out to 9,948 $ at these inputs, and this is the headline figure for the scenario.
  • Mold changeover cost per unit works out to 415 $ / piece at these inputs.
  • Variable mold changeover cost works out to 9,048 $ at these inputs.
  • Fixed mold changeover cost adder works out to 900 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where value-added time during changeover sits at 80% and the headline result is 13,380 $, this scenario comes in 25.65% below the baseline at 9,948 $.
  • Use it when weighing dedicated versus shared forms, building a SMED business case, or pricing the setup overhead into a short-run precast job. 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: 9,948 $ (headline result)
  • Mold changeover cost per unit: 415 $ / piece
  • Variable mold changeover cost: 9,048 $
  • Fixed mold changeover cost adder: 900 $

Run it with your numbers

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

Last reviewed 2026-05-12.