Pump, Compressor & Rotating Equipment Assembly worked example

Unit Assembly Cost at 92% yield and good-unit capture rate: a worked example

Push yield and good-unit capture rate up to 92% and the picture changes. This example computes every intermediate figure at that operating point. Use it when unit assembly cost in pump, compressor and rotating equipment assembly is being put through a pump, compressor and rotating equipment assembly weighted-cost review.

The inputs for this scenario

  • Pumps or compressors assembled in the run: 100 units (unchanged)
  • Direct assembly labor and parts cost per unit: 45 $ / unit (unchanged)
  • Yield / good-unit capture rate: 92 % (raised for this scenario; the documented default is 80)
  • Fixed tooling and setup cost for the run: 250 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Unit Assembly Cost cost = quantity × rate × capture factor + fixed cost) to the inputs above produces each figure below.
  • At this operating point the engine returns 4,390 $ for weighted cost, the number this scenario is built around.
  • At this operating point the engine returns 43.9 $ / piece for per piece value.
  • At this operating point the engine returns 4,140 $ for captured value.
  • At this operating point the engine returns 250 $ for fixed adjustment.

How this compares with the baseline

  • Against the tool's baseline example, where yield and good-unit capture rate sits at 80% and the headline result is 3,850 $, this scenario comes in 14.03% above the baseline at 4,390 $.
  • It computes total run cost as quantity x rate x capture factor plus fixed cost, then divides by quantity for a true per-unit assembly 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

  • Weighted cost: 4,390 $ (headline result)
  • Per piece value: 43.9 $ / piece
  • Captured value: 4,140 $
  • Fixed adjustment: 250 $

Run it with your numbers

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

Last reviewed 2026-05-12.