Musical Instruments & Acoustic Products worked example

Tonewood Blank Yield at 68% target tonewood yield: a worked example

This worked example runs the tonewood blank yield numbers for a tougher week than the baseline: 68% target tonewood yield instead of the typical 95%. Estimate the percentage of tonewood blanks that pass grading for instrument bodies, necks, and soundboards, and compare it to the target yield your shop needs to hit.

The inputs for this scenario

  • Usable tonewood blanks: 8 blanks (held at the documented default)
  • Total tonewood blanks graded: 250 blanks (held at the documented default)
  • Target tonewood yield: 68 % (the input this scenario stresses; the baseline uses 95)

Working through the calculation

  • The calculation starts from the formula this tool documents: Tonewood yield = usable tonewood blanks ÷ total tonewood blanks graded × 100.
  • Tonewood yield works out to 3.2 % at these inputs, and this is the headline figure for the scenario.
  • Yield gap to target works out to 64.8 points at these inputs.
  • Usable tonewood blanks works out to 8 count at these inputs.
  • Total tonewood blanks graded works out to 250 count at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target tonewood yield sits at 95% and the headline result is 3.2 %, this scenario lands almost exactly on the baseline at 3.2 %.
  • Use it after grading each billet, kiln load, or incoming supplier lot to decide whether the run is sellable at quoted prices or needs to be reclassified. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Tonewood yield: 3.2 % (headline result)
  • Yield gap to target: 64.8 points
  • Usable tonewood blanks: 8 count
  • Total tonewood blanks graded: 250 count

Run it with your numbers

  • To rerun this with your own numbers, open the live Tonewood Blank Yield calculator, set target tonewood yield to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.