Construction Products, Windows, Doors & Fenestration worked example

Order Customization Premium at 72% customization premium scope included: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop customization premium scope included to 72%, then walk the calculation through step by step. Estimate custom-order premium from custom openings, premium per opening, applied scope, and engineering adders.

The inputs for this scenario

  • Custom openings or configured units: 48 openings (held at the documented default)
  • Custom premium per opening: 95 $ / opening (held at the documented default)
  • Customization premium scope included: 72 % (the input this scenario stresses; the baseline uses 100)
  • Fixed engineering and order-entry adder: 1,800 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Variable customization premium = custom openings or configured units × custom premium per opening × customization premium scope included.
  • total customization premium works out to 5,083 $ at these inputs, and this is the headline figure for the scenario.
  • premium per custom opening works out to 106 $ / piece at these inputs.
  • variable customization premium works out to 3,283 $ at these inputs.
  • fixed engineering and order-entry adder works out to 1,800 $ at these inputs.

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 20.08% below the baseline at 5,083 $.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to customization premium scope included, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. 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: 5,083 $ (headline result)
  • premium per custom opening: 106 $ / piece
  • variable customization premium: 3,283 $
  • fixed engineering and order-entry adder: 1,800 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Order Customization Premium calculator, set customization premium scope included to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.