Surgical Robotics Manufacturing worked example

Sterile Draping Cost at 66% first-pass acceptance at inspection: a worked example

Suppose first-pass acceptance at inspection falls to 66%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate the manufacturing cost of single-use sterile drapes for surgical robotic arms and consoles.

The inputs for this scenario

  • Sterile drapes produced per run: 800 drapes (held at the documented default)
  • Loaded build cost per drape: 22 $/drape (held at the documented default)
  • First-pass acceptance at inspection: 66 % (the input this scenario stresses; the baseline uses 92)
  • Tooling and fixture amortization: 1,200 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Total draping cost = drapes produced x loaded build cost x first-pass acceptance % + fixture amortization.
  • Total sterile draping cost works out to 12,816 $ at these inputs, and this is the headline figure for the scenario.
  • Sterile draping cost per unit works out to 16.02 $ / piece at these inputs.
  • Variable sterile draping cost works out to 11,616 $ at these inputs.
  • Fixed sterile draping cost adder works out to 1,200 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where first-pass acceptance at inspection sits at 92% and the headline result is 17,392 $, this scenario comes in 26.31% below the baseline at 12,816 $.
  • It computes total sterile draping cost, the effective cost per good drape, and the split between variable build spend and fixed fixture amortization. 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

  • Total sterile draping cost: 12,816 $ (headline result)
  • Sterile draping cost per unit: 16.02 $ / piece
  • Variable sterile draping cost: 11,616 $
  • Fixed sterile draping cost adder: 1,200 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Sterile Draping Cost calculator, set first-pass acceptance at inspection to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.