Switchgear, Panelboards & Electrical Distribution worked example

Test Bay Capacity at 65% test bay uptime: a worked example

This worked example runs the test bay capacity numbers for a tougher week than the baseline: 65% test bay uptime instead of the typical 90%. Test bay capacity tells a switchgear plant how many fully-tested, passing assemblies it can push through final electrical testing in a given period.

The inputs for this scenario

  • Units tested per bay cycle: 4 units / cycle (held at the documented default)
  • Available test cycles in the period: 480 cycles (held at the documented default)
  • Test bay 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 bay capacity capacity = units per cycle × available cycles.
  • Good output capacity works out to 1,211 units at these inputs, and this is the headline figure for the scenario.
  • Gross capacity works out to 1,920 units at these inputs.
  • Uptime loss works out to 672 units at these inputs.
  • 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 bay 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 for capacity planning, ship-date commitments, and deciding when to add test bays or shifts on a switchgear line. 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 output capacity: 1,211 units (headline result)
  • Gross capacity: 1,920 units
  • Uptime loss: 672 units
  • Yield loss: 37.44 units

Run it with your numbers

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

Last reviewed 2026-05-12.