Space Payload & Avionics Manufacturing worked example

Thermal Cycle Test Capacity at 99% chamber uptime and availability: a worked example

Push chamber uptime and availability up to 99% and the picture changes. This example computes every intermediate figure at that operating point. Use it when thermal cycle test capacity in space payload and avionics manufacturing is being asked to take on more work and you need to know if there is room.

The inputs for this scenario

  • Payload units tested per thermal cycle: 4 units / cycle (unchanged)
  • Available thermal-vacuum chamber cycles: 480 cycles (unchanged)
  • Chamber uptime / availability: 99 % (raised for this scenario; the documented default is 90)
  • Thermal-cycle first-pass yield: 97 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross thermal cycle test capacity = thermal cycle test capacity output per cycle × available thermal cycle test capacity cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 1,844 units for good thermal cycle test capacity, the number this scenario is built around.
  • At this operating point the engine returns 1,920 units for gross thermal cycle test capacity.
  • At this operating point the engine returns 19.2 units for thermal cycle test capacity downtime loss.
  • At this operating point the engine returns 57.02 units for thermal cycle test capacity yield loss.

How this compares with the baseline

  • Against the tool's baseline example, where chamber uptime and availability sits at 90% and the headline result is 1,676 units, this scenario comes in 10% above the baseline at 1,844 units.
  • It computes gross test capacity from units per cycle times available cycles, then multiplies by chamber uptime and first-pass yield to get good qualified units. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Good thermal cycle test capacity: 1,844 units (headline result)
  • Gross thermal cycle test capacity: 1,920 units
  • Thermal cycle test capacity downtime loss: 19.2 units
  • Thermal cycle test capacity yield loss: 57.02 units

Run it with your numbers

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

Last reviewed 2026-05-12.