Construction Products, Windows, Doors & Fenestration worked example

U-Factor Test Workload at 110% thermal test scope included: a worked example

What does the result look like when thermal test scope included reaches 110%? The full calculation is worked below with real intermediate numbers. budgeting NFRC-style U-factor testing, simulation validation, or lab capacity

The inputs for this scenario

  • U-factor test specimens or simulations: 14 tests (unchanged)
  • cost per U-factor test or simulation: 1,280 $ / test (unchanged)
  • thermal test scope included: 110 % (raised for this scenario; the documented default is 100)
  • fixed lab setup and certification adder: 3,600 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Variable U-factor testing cost = U-factor test specimens or simulations × cost per U-factor test or simulation × thermal test scope included) to the inputs above produces each figure below.
  • At this operating point the engine returns 23,312 $ for total u-factor test workload cost, the number this scenario is built around.
  • At this operating point the engine returns 1,665 $ / piece for cost per u-factor test.
  • At this operating point the engine returns 19,712 $ for variable u-factor testing cost.
  • At this operating point the engine returns 3,600 $ for fixed lab setup and certification adder.

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 8.33% above the baseline at 23,312 $.
  • A figure at this level is achievable when thermal test scope included is genuinely sustained, not just peaked for a shift. 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: 23,312 $ (headline result)
  • cost per U-factor test: 1,665 $ / piece
  • variable U-factor testing cost: 19,712 $
  • fixed lab setup and certification adder: 3,600 $

Run it with your numbers

  • Every input above is editable in the live U-Factor Test Workload calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.