Security, Fire & Life Safety Products worked example

Burn-In Capacity at 99% burn-in chamber uptime: a worked example in security, fire & life safety products

What does the result look like when burn-in chamber uptime reaches 99%? The full calculation is worked below with real intermediate numbers. Use it when burn-in capacity in security, fire and life safety products is being asked to take on more work and you need to know if there is room.

The inputs for this scenario

  • Devices per burn-in cycle: 4 units / cycle (unchanged)
  • Burn-in cycles available in the window: 480 cycles (unchanged)
  • Burn-in chamber uptime: 99 % (raised for this scenario; the documented default is 90)
  • Post burn-in first-pass yield: 97 % (unchanged)

Working through the calculation

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

How this compares with the baseline

  • Against the tool's baseline example, where burn-in chamber uptime sits at 90% and the headline result is 1,676 units, this scenario comes in 10% above the baseline at 1,844 units.
  • A figure at this level is achievable when burn-in chamber uptime is genuinely sustained, not just peaked for a shift. It assumes uptime and yield are independent multipliers; a systemic thermal issue that simultaneously lowers both won't be modeled accurately.

Results at a glance

  • Good burn-in capacity: 1,844 units (headline result)
  • Gross burn-in capacity: 1,920 units
  • Burn-in capacity downtime loss: 19.2 units
  • Burn-in capacity yield loss: 57.02 units

Run it with your numbers

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

Last reviewed 2026-05-12.