Motors, Generators & Electrification Equipment worked example

Motor Test Stand Capacity at 65% test stand uptime: a worked example

This worked example runs the motor test stand capacity numbers for a tougher week than the baseline: 65% test stand uptime instead of the typical 90%. Estimate how many motors a test stand can run per shift so test and production teams can confirm capacity covers build demand before committing the schedule.

The inputs for this scenario

  • Motors tested per test cycle: 4 motors / cycle (held at the documented default)
  • Available test cycles per shift: 480 cycles (held at the documented default)
  • Test stand uptime: 65 % (the input this scenario stresses; the baseline uses 90)
  • First-pass test yield: 97 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross test capacity = motors tested per cycle × available test cycles.
  • Good motors per shift works out to 1,211 units at these inputs, and this is the headline figure for the scenario.
  • Gross test capacity works out to 1,920 units at these inputs.
  • Test stand downtime loss works out to 672 units at these inputs.
  • Retest yield loss works out to 37.44 units at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where test stand uptime sits at 90% and the headline result is 1,676 units, this scenario comes in 27.78% below the baseline at 1,211 units.
  • Use it when sizing or load-balancing an end-of-line test cell, planning a shift, or checking whether testing can match assembly 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

  • Good motors per shift: 1,211 units (headline result)
  • Gross test capacity: 1,920 units
  • Test stand downtime loss: 672 units
  • Retest yield loss: 37.44 units

Run it with your numbers

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

Last reviewed 2026-05-12.