Industrial Equipment, Machinery & Capital Goods worked example

Engineering Change Impact with available engineering change budget of 105,000 $: a worked example

What does the result look like when available engineering change budget reaches 105,000 $? The full calculation is worked below with real intermediate numbers. Use it when deciding whether ECOs, customer changes, supplier substitutions, or design fixes need change order recovery.

The inputs for this scenario

  • Available engineering change budget: 105,000 $ (raised for this scenario; the documented default is 42,000)
  • Required engineering change cost: 58,000 $ (unchanged)
  • Project revenue or budget basis: 750,000 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Engineering change cost gap = available change budget - required engineering change cost) to the inputs above produces each figure below.
  • At this operating point the engine returns 6.27 % for engineering change impact, the number this scenario is built around.
  • At this operating point the engine returns 47,000 value for engineering change cost gap.
  • At this operating point the engine returns 105,000 value for available change budget.
  • At this operating point the engine returns 58,000 value for required engineering change cost.

How this compares with the baseline

  • Against the tool's baseline example, where available engineering change budget sits at 42,000 $ and the headline result is -2.13 %, this scenario comes in 394% above the baseline at 6.27 %.
  • A figure at this level is achievable when available engineering change budget is genuinely sustained, not just peaked for a shift. It captures the direct cost gap only; schedule slip, downstream rework, and warranty exposure from a change are not in the number, so a small percentage impact can still carry large hidden risk.

Results at a glance

  • Engineering change impact: 6.27 % (headline result)
  • Engineering change cost gap: 47,000 value
  • Available change budget: 105,000 value
  • Required engineering change cost: 58,000 value

Run it with your numbers

  • Every input above is editable in the live Engineering Change Impact calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.