Waste-to-Energy Equipment worked example

Weldment Cost at 65% first-pass acceptance: a worked example

Suppose first-pass acceptance falls to 65%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimates weldment cost for a waste-to-energy fabrication from total weld length, per-inch welding cost, and the first-pass weld acceptance rate.

The inputs for this scenario

  • Deposited Weld Length: 1,800 in (held at the documented default)
  • Welding Cost per Inch: 22 $/in (held at the documented default)
  • First-Pass Acceptance: 65 % (the input this scenario stresses; the baseline uses 90)
  • Fit-Up & NDE Setup: 3,800 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Cost = weld length x welding cost per inch x acceptance % + fit-up & NDE setup.
  • Total weldment cost works out to 29,540 $ at these inputs, and this is the headline figure for the scenario.
  • Weldment cost per unit works out to 16.41 $ / piece at these inputs.
  • Variable weldment cost works out to 25,740 $ at these inputs.
  • Fixed weldment cost adder works out to 3,800 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where first-pass acceptance sits at 90% and the headline result is 39,440 $, this scenario comes in 25.1% below the baseline at 29,540 $.
  • It computes total weldment cost from weld length, per-inch cost, an acceptance factor and fixed setup, and breaks out variable versus fixed cost and cost per inch. 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 weldment cost: 29,540 $ (headline result)
  • Weldment cost per unit: 16.41 $ / piece
  • Variable weldment cost: 25,740 $
  • Fixed weldment cost adder: 3,800 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Weldment Cost calculator, set first-pass acceptance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.