Environmental Test Chambers & Reliability Labs worked example

Test Cost Per Hour with allocated lab operating cost of 192,500 $: a worked example

Suppose allocated lab operating cost falls to 192,500 $. This page works the full calculation at that level so you can see exactly which result moves and by how much. Calculate loaded reliability lab test cost per chamber-hour from allocated lab cost, billable chamber-hours, and allocation factor.

The inputs for this scenario

  • Allocated lab operating cost: 192,500 $ (the input this scenario stresses; the baseline uses 385,000)
  • Billable chamber-hours: 5,200 chamber-hr (held at the documented default)
  • Allocation or burden factor: 1.18 x (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Raw chamber-hour cost = allocated lab operating cost รท billable chamber-hours.
  • Loaded test cost per chamber-hour works out to 43.68 $ / hr at these inputs, and this is the headline figure for the scenario.
  • Raw chamber-hour cost works out to 37.02 $ / chamber-hr at these inputs.
  • Allocation or burden factor works out to 1.18 x at these inputs.
  • Billable chamber-hours works out to 5,200 chamber-hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where allocated lab operating cost sits at 385,000 $ and the headline result is 87.37 $ / hr, this scenario comes in 50% below the baseline at 43.68 $ / hr.
  • It divides the allocated lab operating cost by billable chamber-hours to get a raw hourly cost, then multiplies by a burden factor to produce the loaded rate. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Loaded test cost per chamber-hour: 43.68 $ / hr (headline result)
  • Raw chamber-hour cost: 37.02 $ / chamber-hr
  • Allocation or burden factor: 1.18 x
  • Billable chamber-hours: 5,200 chamber-hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Test Cost Per Hour calculator, set allocated lab operating cost to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.