Construction Products, Windows, Doors & Fenestration worked example

Order Customization Premium at 110% customization premium scope included: a worked example

What does the result look like when customization premium scope included reaches 110%? The full calculation is worked below with real intermediate numbers. deciding whether a custom fenestration order needs an upcharge

The inputs for this scenario

  • Custom openings or configured units: 48 openings (unchanged)
  • Custom premium per opening: 95 $ / opening (unchanged)
  • Customization premium scope included: 110 % (raised for this scenario; the documented default is 100)
  • Fixed engineering and order-entry adder: 1,800 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Variable customization premium = custom openings or configured units × custom premium per opening × customization premium scope included) to the inputs above produces each figure below.
  • At this operating point the engine returns 6,816 $ for total customization premium, the number this scenario is built around.
  • At this operating point the engine returns 142 $ / piece for premium per custom opening.
  • At this operating point the engine returns 5,016 $ for variable customization premium.
  • At this operating point the engine returns 1,800 $ for fixed engineering and order-entry adder.

How this compares with the baseline

  • Against the tool's baseline example, where customization premium scope included sits at 100% and the headline result is 6,360 $, this scenario comes in 7.17% above the baseline at 6,816 $.
  • A figure at this level is achievable when customization premium scope included is genuinely sustained, not just peaked for a shift. It applies one average premium per opening, so orders mixing light customization with heavily engineered specialty shapes should be costed in separate tiers.

Results at a glance

  • total customization premium: 6,816 $ (headline result)
  • premium per custom opening: 142 $ / piece
  • variable customization premium: 5,016 $
  • fixed engineering and order-entry adder: 1,800 $

Run it with your numbers

  • Every input above is editable in the live Order Customization Premium calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.