Tooling, Fixtures, Dies & Mold Economics worked example

Mold Changeover Cost at 92% avoidable share: a worked example in tooling, fixtures, dies & mold economics

Push avoidable share up to 92% and the picture changes. This example computes every intermediate figure at that operating point. A molding plant quantifies changeover burden when deciding whether to combine short runs of a part family.

The inputs for this scenario

  • Changeovers Per Period: 30 changeovers (unchanged)
  • Cost Per Changeover: 320 $/changeover (unchanged)
  • Avoidable Share: 92 % (raised for this scenario; the documented default is 80)
  • Crane & Rigging Flat: 450 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Total changeover cost = changeovers x cost per changeover x avoidable share% + rigging flat) to the inputs above produces each figure below.
  • At this operating point the engine returns 9,282 $ for total mold changeover cost, the number this scenario is built around.
  • At this operating point the engine returns 309 $ / piece for mold changeover cost per unit.
  • At this operating point the engine returns 8,832 $ for variable mold changeover cost.
  • At this operating point the engine returns 450 $ for fixed mold changeover cost adder.

How this compares with the baseline

  • Against the tool's baseline example, where avoidable share sits at 80% and the headline result is 8,130 $, this scenario comes in 14.17% above the baseline at 9,282 $.
  • It multiplies changeovers by cost each and an avoidable-share factor to get variable cost, adds a fixed crane and rigging flat, and reports total and per-changeover cost. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Total mold changeover cost: 9,282 $ (headline result)
  • Mold changeover cost per unit: 309 $ / piece
  • Variable mold changeover cost: 8,832 $
  • Fixed mold changeover cost adder: 450 $

Run it with your numbers

  • Every input above is editable in the live Mold Changeover Cost calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.