Single-Use Bioprocess Assemblies worked example

Tubing Cut Length Cost at 99% usable tubing yield after cuts: a worked example

What does the result look like when usable tubing yield after cuts reaches 99%? The full calculation is worked below with real intermediate numbers. Used by single-use assembly estimators to price the tubing content of a fluid-path build before a production run.

The inputs for this scenario

  • Total tubing cut length: 3,200 ft (unchanged)
  • Silicone/TPE tubing cost per foot: 3.4 $/ft (unchanged)
  • Usable tubing yield after cuts: 99 % (raised for this scenario; the documented default is 92)
  • Cut, weld and cleanroom setup charge: 1,800 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Cost = cut length x cost per foot x usable yield % + cut & cleanroom setup) to the inputs above produces each figure below.
  • At this operating point the engine returns 12,571 $ for total tubing cut length cost, the number this scenario is built around.
  • At this operating point the engine returns 3.93 $ / piece for tubing cut length cost per unit.
  • At this operating point the engine returns 10,771 $ for variable tubing cut length cost.
  • At this operating point the engine returns 1,800 $ for fixed tubing cut length cost adder.

How this compares with the baseline

  • Against the tool's baseline example, where usable tubing yield after cuts sits at 92% and the headline result is 11,810 $, this scenario comes in 6.45% above the baseline at 12,571 $.
  • A figure at this level is achievable when usable tubing yield after cuts is genuinely sustained, not just peaked for a shift. The usable-yield term here scales material cost rather than adding scrap on top, so if you model yield as added waste you must invert the percentage before entering it.

Results at a glance

  • Total tubing cut length cost: 12,571 $ (headline result)
  • Tubing cut length cost per unit: 3.93 $ / piece
  • Variable tubing cut length cost: 10,771 $
  • Fixed tubing cut length cost adder: 1,800 $

Run it with your numbers

  • Every input above is editable in the live Tubing Cut Length Cost calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.