Aerospace & Defense Manufacturing worked example

Aerospace Machining Yield at 69% target machining yield: a worked example

This worked example runs the aerospace machining yield numbers for a tougher week than the baseline: 69% target machining yield instead of the typical 96%. Calculate machining yield for aerospace parts from accepted machined parts, total parts machined, and the target first-pass yield.

The inputs for this scenario

  • Accepted machined aerospace parts: 188 parts (held at the documented default)
  • Total aerospace parts machined: 205 parts (held at the documented default)
  • Target machining yield: 69 % (the input this scenario stresses; the baseline uses 96)

Working through the calculation

  • The calculation starts from the formula this tool documents: Aerospace machining yield = accepted machined parts ÷ total parts machined × 100.
  • Aerospace machining yield works out to 91.71 % machining yield at these inputs, and this is the headline figure for the scenario.
  • Machining yield gap works out to -22.71 percentage points at these inputs.
  • Accepted machined aerospace parts works out to 188 parts at these inputs.
  • Total aerospace parts machined works out to 205 parts at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target machining yield sits at 96% and the headline result is 91.71 % machining yield, this scenario lands almost exactly on the baseline at 91.71 % machining yield.
  • Use it at the end of a run, shift, or lot to report first-pass yield to AS9100 records and to compare actual performance against a program's contractual or internal yield target. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Aerospace machining yield: 91.71 % machining yield (headline result)
  • Machining yield gap: -22.71 percentage points
  • Accepted machined aerospace parts: 188 parts
  • Total aerospace parts machined: 205 parts

Run it with your numbers

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

Last reviewed 2026-05-12.