Elevators, Escalators & Vertical Transport Equipment worked example

Elevator Door Cycle Count at 68% door operator uptime: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop door operator uptime to 68%, then walk the calculation through step by step. Estimate usable elevator door cycle capacity from openings per cycle, available cycles, uptime, and door-system pass rate.

The inputs for this scenario

  • Door open/close events per test cycle: 2 open/close cycles (held at the documented default)
  • Scheduled door endurance test cycles: 18,000 cycles (held at the documented default)
  • Door operator uptime: 68 % (the input this scenario stresses; the baseline uses 94)
  • Door cycle acceptance yield: 98 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross door cycles = door openings per cycle × available door test cycles.
  • Accepted door cycles works out to 23,990 door cycles at these inputs, and this is the headline figure for the scenario.
  • Gross door cycles works out to 36,000 door cycles at these inputs.
  • Door cycles lost to downtime works out to 11,520 door cycles at these inputs.
  • Door cycles held for adjustment works out to 490 door cycles at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where door operator uptime sits at 94% and the headline result is 33,163 door cycles, this scenario comes in 27.66% below the baseline at 23,990 door cycles.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to door operator uptime, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It applies uptime and yield as flat percentages on the whole run; it does not model when failures cluster, infant-mortality burn-in, or partial-cycle faults that may still carry diagnostic value.

Results at a glance

  • Accepted door cycles: 23,990 door cycles (headline result)
  • Gross door cycles: 36,000 door cycles
  • Door cycles lost to downtime: 11,520 door cycles
  • Door cycles held for adjustment: 490 door cycles

Run it with your numbers

  • To rerun this with your own numbers, open the live Elevator Door Cycle Count calculator, set door operator uptime to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.