Musical Instruments & Acoustic Products worked example

String Setup Labor at 12% bench allowance: a worked example

What does the result look like when bench allowance reaches 12%? The full calculation is worked below with real intermediate numbers. Use it when the setup bench is taking on a batch and you need a defensible labor estimate for stringing, action setting, intonation, and play test.

The inputs for this scenario

  • Instruments in setup queue: 120 instruments (unchanged)
  • Instruments setup per minute: 12 instruments / min (unchanged)
  • Bench allowance: 12 % (raised for this scenario; the documented default is 10)

Working through the calculation

  • Applying the documented formula (Base string setup labor = instruments in setup queue รท instruments setup per minute) to the inputs above produces each figure below.
  • At this operating point the engine returns 11.2 hr for required string setup labor, the number this scenario is built around.
  • At this operating point the engine returns 10 hr for base string setup labor.
  • At this operating point the engine returns 12 % for bench allowance applied.
  • At this operating point the engine returns 12 pieces / min for instruments setup per minute.

How this compares with the baseline

  • Against the tool's baseline example, where bench allowance sits at 10% and the headline result is 11 hr, this scenario comes in 1.82% above the baseline at 11.2 hr.
  • A figure at this level is achievable when bench allowance is genuinely sustained, not just peaked for a shift. A single instruments-per-minute rate flattens the difference between a quick restring and a full fret-level-and-setup; segment by setup type when the mix varies.

Results at a glance

  • Required string setup labor: 11.2 hr (headline result)
  • Base string setup labor: 10 hr
  • Bench allowance applied: 12 %
  • Instruments setup per minute: 12 pieces / min

Run it with your numbers

  • Every input above is editable in the live String Setup Labor calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.