NPI, DFM/DFA & Engineering Change worked example

DFM Savings at 54% implementation capture: a worked example

Suppose implementation capture falls to 54%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Quantify the annual cost benefit of a design-for-manufacturability change net of the one-time effort to implement it.

The inputs for this scenario

  • Annual Production Volume: 60,000 units/yr (held at the documented default)
  • Savings Per Unit: 0.95 $/unit (held at the documented default)
  • Implementation Capture: 54 % (the input this scenario stresses; the baseline uses 75)
  • DFM Implementation Cost: 18,000 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Net DFM benefit = annual volume x savings per unit x capture% + implementation cost.
  • Total dfm savings cost works out to 48,780 $ at these inputs, and this is the headline figure for the scenario.
  • Dfm savings cost per unit works out to 0.81 $ / piece at these inputs.
  • Variable dfm savings cost works out to 30,780 $ at these inputs.
  • Fixed dfm savings adder works out to 18,000 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where implementation capture sits at 75% and the headline result is 60,750 $, this scenario comes in 19.7% below the baseline at 48,780 $.
  • It computes the net annual benefit of a DFM change by multiplying volume, per-unit savings, and a realistic capture rate, then nets it against the one-time implementation cost. 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 dfm savings cost: 48,780 $ (headline result)
  • Dfm savings cost per unit: 0.81 $ / piece
  • Variable dfm savings cost: 30,780 $
  • Fixed dfm savings adder: 18,000 $

Run it with your numbers

  • To rerun this with your own numbers, open the live DFM Savings calculator, set implementation capture to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.