Elevators, Escalators & Vertical Transport Equipment worked example

Test Tower Capacity at 99% test tower uptime: a worked example

This scenario runs the test tower capacity calculation on the strong side: 99% test tower uptime, with every other input held at its documented default. a production or test manager needs to know whether test tower slots can support shipment commitments

The inputs for this scenario

  • Elevator units per test slot: 1 units / slot (unchanged)
  • Available test tower slots: 36 slots (unchanged)
  • Test tower uptime: 99 % (raised for this scenario; the documented default is 88)
  • First-pass tower test yield: 96 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross tower test capacity = elevators per test slot × available test tower slots) to the inputs above produces each figure below.
  • At this operating point the engine returns 34.21 elevator units for accepted test tower capacity, the number this scenario is built around.
  • At this operating point the engine returns 36 elevator units for gross tower test capacity.
  • At this operating point the engine returns 0.36 elevator units for units lost to tower downtime.
  • At this operating point the engine returns 1.43 elevator units for units held for adjustment or retest.

How this compares with the baseline

  • Against the tool's baseline example, where test tower uptime sits at 88% and the headline result is 30.41 elevator units, this scenario comes in 12.5% above the baseline at 34.21 elevator units.
  • Use it when planning test tower throughput, committing ship dates, or quantifying how much capacity retest and downtime are consuming. 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 test tower capacity: 34.21 elevator units (headline result)
  • Gross tower test capacity: 36 elevator units
  • Units lost to tower downtime: 0.36 elevator units
  • Units held for adjustment or retest: 1.43 elevator units

Run it with your numbers

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

Last reviewed 2026-05-12.