Construction Products, Windows, Doors & Fenestration worked example
U-Factor Test Workload at 72% thermal test scope included: a worked example
Here is what the math looks like when conditions slip. We hold every other input steady and drop thermal test scope included to 72%, then walk the calculation through step by step. Estimate U-factor thermal test workload cost from sample count, test cost, scope, and fixed lab adders.
The inputs for this scenario
- U-factor test specimens or simulations: 14 tests (held at the documented default)
- cost per U-factor test or simulation: 1,280 $ / test (held at the documented default)
- thermal test scope included: 72 % (the input this scenario stresses; the baseline uses 100)
- fixed lab setup and certification adder: 3,600 $ (held at the documented default)
Working through the calculation
- The calculation starts from the formula this tool documents: Variable U-factor testing cost = U-factor test specimens or simulations × cost per U-factor test or simulation × thermal test scope included.
- total U-factor test workload cost works out to 16,502 $ at these inputs, and this is the headline figure for the scenario.
- cost per U-factor test works out to 1,179 $ / piece at these inputs.
- variable U-factor testing cost works out to 12,902 $ at these inputs.
- fixed lab setup and certification adder works out to 3,600 $ at these inputs.
How this compares with the baseline
- Against the tool's baseline example, where thermal test scope included sits at 100% and the headline result is 21,520 $, this scenario comes in 23.32% below the baseline at 16,502 $.
- The practical read: the gap between this scenario and the baseline is entirely attributable to thermal test scope included, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes a uniform cost per test; a mix of cheap simulations and expensive physical hot-box runs needs a weighted average or separate calculations to stay accurate.
Results at a glance
- total U-factor test workload cost: 16,502 $ (headline result)
- cost per U-factor test: 1,179 $ / piece
- variable U-factor testing cost: 12,902 $
- fixed lab setup and certification adder: 3,600 $
Run it with your numbers
- To rerun this with your own numbers, open the live U-Factor Test Workload calculator, set thermal test scope included to your actual value, and adjust the remaining inputs to match your operation.
Last reviewed 2026-05-12.