Construction Machinery & Attachments worked example

Cost per Attachment at 110% cost scope included: a worked example

This scenario runs the cost per attachment calculation on the strong side: 110% cost scope included, with every other input held at its documented default. building a defensible cost floor for buckets, grapples, couplers, forks, breakers, or other attachments

The inputs for this scenario

  • Attachments in the build or quote lot: 22 units (unchanged)
  • Variable cost per attachment: 4,150 $ / unit (unchanged)
  • Cost scope included: 110 % (raised for this scenario; the documented default is 100)
  • Fixed engineering, fixture, and setup cost: 12,500 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Variable attachment cost = attachments in the build or quote lot × variable cost per attachment × cost scope included) to the inputs above produces each figure below.
  • At this operating point the engine returns 112,930 $ for total attachment cost, the number this scenario is built around.
  • At this operating point the engine returns 5,133 $ / piece for cost per attachment.
  • At this operating point the engine returns 100,430 $ for variable attachment cost.
  • At this operating point the engine returns 12,500 $ for fixed engineering, fixture, and setup cost.

How this compares with the baseline

  • Against the tool's baseline example, where cost scope included sits at 100% and the headline result is 103,800 $, this scenario comes in 8.8% above the baseline at 112,930 $.
  • Use it when quoting a build lot, comparing make-vs-buy, or deciding how lot size changes your per-attachment price. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • total attachment cost: 112,930 $ (headline result)
  • cost per attachment: 5,133 $ / piece
  • variable attachment cost: 100,430 $
  • fixed engineering, fixture, and setup cost: 12,500 $

Run it with your numbers

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

Last reviewed 2026-05-12.