Rail, Transit & Rolling Stock Manufacturing worked example

Door System Test Capacity at 65% test rig uptime: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop test rig uptime to 65%, then walk the calculation through step by step. Estimate door system test capacity for rail, transit and rolling stock manufacturing using production-ready inputs so teams can confirm whether capacity can cover demand before committing the schedule.

The inputs for this scenario

  • Doors validated per test cell cycle: 4 units / cycle (held at the documented default)
  • Scheduled test cell cycles available: 480 cycles (held at the documented default)
  • Test rig uptime (no faults or waiting): 65 % (the input this scenario stresses; the baseline uses 90)
  • First-pass yield on door endurance/leak test: 97 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross door system test capacity = door system test capacity output per cycle × available door system test capacity cycles.
  • Good door system test capacity works out to 1,211 units at these inputs, and this is the headline figure for the scenario.
  • Gross door system test capacity works out to 1,920 units at these inputs.
  • Door system test capacity downtime loss works out to 672 units at these inputs.
  • Door system test capacity 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 rig 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.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to test rig uptime, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes a steady doors-per-cycle rate and a single yield figure; mixed door variants with very different test durations need to be modeled separately.

Results at a glance

  • Good door system test capacity: 1,211 units (headline result)
  • Gross door system test capacity: 1,920 units
  • Door system test capacity downtime loss: 672 units
  • Door system test capacity yield loss: 37.44 units

Run it with your numbers

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

Last reviewed 2026-05-12.