MedTech Manufacturing worked example

Medical Device Yield at 70% target yield rate: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop target yield rate to 70%, then walk the calculation through step by step. Calculate first-pass yield (FPY) from accepted units and total units started, with gap-to-target analysis.

The inputs for this scenario

  • Accepted units (first pass): 470 devices (held at the documented default)
  • Total units started: 500 devices (held at the documented default)
  • Target yield rate: 70 % (the input this scenario stresses; the baseline uses 97)

Working through the calculation

  • The calculation starts from the formula this tool documents: Medical device yield rate = accepted units ÷ total units started × 100.
  • First-pass yield (FPY) works out to 94 % yield at these inputs, and this is the headline figure for the scenario.
  • Yield gap to target works out to -24 points at these inputs.
  • Accepted units works out to 470 count at these inputs.
  • Total units started works out to 500 count at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target yield rate sits at 97% and the headline result is 94 % yield, this scenario lands almost exactly on the baseline at 94 % yield.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to target yield rate, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. FPY treats every reject equally and ignores rework recovery, so a line that reworks and re-passes most units can show poor FPY yet acceptable final yield.

Results at a glance

  • First-pass yield (FPY): 94 % yield (headline result)
  • Yield gap to target: -24 points
  • Accepted units: 470 count
  • Total units started: 500 count

Run it with your numbers

  • To rerun this with your own numbers, open the live Medical Device Yield calculator, set target yield rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.