Musical Instruments & Acoustic Products worked example

Custom Build Quote Cost at 58% scope capture share: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop scope capture share to 58%, then walk the calculation through step by step. Build a weighted quote for a one-off or short-run custom instrument or acoustic product, covering material, hardware, labor capture, and a design and setup adder.

The inputs for this scenario

  • Custom build hours estimated: 100 hours (held at the documented default)
  • Blended shop rate: 45 $ / hour (held at the documented default)
  • Scope capture share: 58 % (the input this scenario stresses; the baseline uses 80)
  • Design and setup adder: 250 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Variable custom build cost = custom build hours estimated × blended shop rate × scope capture share.
  • Total custom build quote works out to 2,860 $ at these inputs, and this is the headline figure for the scenario.
  • Quote cost per build hour works out to 28.6 $ / piece at these inputs.
  • Variable custom build cost works out to 2,610 $ at these inputs.
  • Design and setup adder works out to 250 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where scope capture share sits at 80% and the headline result is 3,850 $, this scenario comes in 25.71% below the baseline at 2,860 $.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to scope capture share, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes your hour estimate is reasonably accurate — custom builds notoriously overrun, so pad the estimate or carry contingency for discovery and rework.

Results at a glance

  • Total custom build quote: 2,860 $ (headline result)
  • Quote cost per build hour: 28.6 $ / piece
  • Variable custom build cost: 2,610 $
  • Design and setup adder: 250 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Custom Build Quote Cost calculator, set scope capture share to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.