Construction Machinery & Attachments worked example

Labor per Unit at 72% labor scope included in this cost: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop labor scope included in this cost to 72%, then walk the calculation through step by step. Estimate labor cost per construction attachment or machine assembly unit.

The inputs for this scenario

  • Direct labor hours booked to the attachment lot: 34 units (held at the documented default)
  • Loaded labor and shop burden rate: 86 $ / unit (held at the documented default)
  • Labor scope included in this cost: 72 % (the input this scenario stresses; the baseline uses 100)
  • Fixed setup, training, and support labor: 520 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Variable attachment labor cost = direct labor hours for the attachment lot × loaded labor and shop burden rate × labor scope included.
  • total attachment labor cost works out to 2,625 $ at these inputs, and this is the headline figure for the scenario.
  • labor cost per labor hour basis works out to 77.21 $ / piece at these inputs.
  • variable attachment labor cost works out to 2,105 $ at these inputs.
  • fixed setup, training, and support labor works out to 520 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where labor scope included in this cost sits at 100% and the headline result is 3,444 $, this scenario comes in 23.77% below the baseline at 2,625 $.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to labor scope included in this cost, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It only models labor — steel, hardware, paint, hydraulics, and outside processing like machining or galvanizing must be costed separately and added to reach a full unit cost.

Results at a glance

  • total attachment labor cost: 2,625 $ (headline result)
  • labor cost per labor hour basis: 77.21 $ / piece
  • variable attachment labor cost: 2,105 $
  • fixed setup, training, and support labor: 520 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Labor per Unit calculator, set labor scope included in this cost to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.