Bearings, Gears & Power Transmission worked example

Noise Test Capacity at 99% noise-test stand uptime: a worked example

This scenario runs the noise test capacity calculation on the strong side: 99% noise-test stand uptime, with every other input held at its documented default. a power transmission manufacturer needs to verify whether noise or vibration test stands can clear the production schedule

The inputs for this scenario

  • Units tested per test cycle: 4 units/cycle (unchanged)
  • Available noise-test cycles: 150 cycles (unchanged)
  • Noise-test stand uptime: 99 % (raised for this scenario; the documented default is 90)
  • First-pass noise-test yield: 97 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross units tested = units tested per cycle × available noise-test cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 576 units for accepted noise-test capacity, the number this scenario is built around.
  • At this operating point the engine returns 600 units for gross units tested.
  • At this operating point the engine returns 6 units for units lost to stand downtime.
  • At this operating point the engine returns 17.82 units for units requiring retest or teardown.

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 10% above the baseline at 576 units.
  • Use it when committing ship quantities, sizing an NVH test cell, or checking whether the noise station limits line output. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Accepted noise-test capacity: 576 units (headline result)
  • Gross units tested: 600 units
  • Units lost to stand downtime: 6 units
  • Units requiring retest or teardown: 17.82 units

Run it with your numbers

  • Every input above is editable in the live Noise Test Capacity calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.