Contract Manufacturing, Job Shop Quoting & Make-to-Order worked example

Custom Part Cost at 72% costed quote scope included: a worked example

Suppose costed quote scope included falls to 72%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate total cost for a customer-specific part or assembly.

The inputs for this scenario

  • Quoted part order quantity: 650 parts (held at the documented default)
  • Variable cost per custom part: 24.6 $ / part (held at the documented default)
  • Costed quote scope included: 72 % (the input this scenario stresses; the baseline uses 100)
  • Fixed setup, tooling, and engineering cost: 3,900 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Variable custom part cost = quoted part order quantity × variable cost per custom part × costed quote scope included.
  • total custom part cost works out to 15,413 $ at these inputs, and this is the headline figure for the scenario.
  • variable cost per custom part works out to 23.71 $ / piece at these inputs.
  • variable custom part cost works out to 11,513 $ at these inputs.
  • fixed setup, tooling, and engineering cost works out to 3,900 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where costed quote scope included sits at 100% and the headline result is 19,890 $, this scenario comes in 22.51% below the baseline at 15,413 $.
  • It multiplies order quantity by variable cost per part (scaled by the share of scope costed), then adds fixed setup, tooling, and engineering cost to produce total job cost and an effective per-piece figure. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • total custom part cost: 15,413 $ (headline result)
  • variable cost per custom part: 23.71 $ / piece
  • variable custom part cost: 11,513 $
  • fixed setup, tooling, and engineering cost: 3,900 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Custom Part Cost calculator, set costed quote scope included to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.