Bearings, Gears & Power Transmission worked example

Noise Test Capacity at 65% noise-test stand uptime: a worked example

This worked example runs the noise test capacity numbers for a tougher week than the baseline: 65% noise-test stand uptime instead of the typical 90%. Estimate accepted NVH or runout noise-test output from units per test cycle, available cycles, stand uptime, and first-pass pass rate.

The inputs for this scenario

  • Units tested per test cycle: 4 units/cycle (held at the documented default)
  • Available noise-test cycles: 150 cycles (held at the documented default)
  • Noise-test stand uptime: 65 % (the input this scenario stresses; the baseline uses 90)
  • First-pass noise-test yield: 97 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross units tested = units tested per cycle × available noise-test cycles.
  • Accepted noise-test capacity works out to 378 units at these inputs, and this is the headline figure for the scenario.
  • Gross units tested works out to 600 units at these inputs.
  • Units lost to stand downtime works out to 210 units at these inputs.
  • Units requiring retest or teardown works out to 11.7 units at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where noise-test stand uptime sits at 90% and the headline result is 524 units, this scenario comes in 27.78% below the baseline at 378 units.
  • Use it when committing ship quantities, sizing an NVH test cell, or checking whether the noise station limits line output. 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

  • Accepted noise-test capacity: 378 units (headline result)
  • Gross units tested: 600 units
  • Units lost to stand downtime: 210 units
  • Units requiring retest or teardown: 11.7 units

Run it with your numbers

  • To rerun this with your own numbers, open the live Noise Test Capacity calculator, set noise-test stand uptime to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.