Lasers, Optics & Photonics Manufacturing worked example

Optical Assembly Yield at 66% assembly yield target: a worked example

This worked example runs the optical assembly yield numbers for a tougher week than the baseline: 66% assembly yield target instead of the typical 92%. Calculate first-pass yield for optical assembly operations (lens mounting, beam expander assembly, fiber coupling, detector integration) by comparing conforming assemblies to total assemblies built.

The inputs for this scenario

  • Conforming assemblies (first-pass): 42 assemblies (held at the documented default)
  • Total assemblies built: 48 assemblies (held at the documented default)
  • Assembly yield target: 66 % (the input this scenario stresses; the baseline uses 92)

Working through the calculation

  • The calculation starts from the formula this tool documents: Optical assembly yield = conforming assemblies / total built x 100.
  • Optical assembly yield rate works out to 87.5 % at these inputs, and this is the headline figure for the scenario.
  • Gap to yield target works out to -21.5 points at these inputs.
  • Conforming assemblies works out to 42 count at these inputs.
  • Total assemblies built works out to 48 count at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where assembly yield target sits at 92% and the headline result is 87.5 %, this scenario lands almost exactly on the baseline at 87.5 %.
  • Use it at end-of-shift or end-of-lot to grade a build cell, qualify a new alignment process, or check whether a lot meets its contractual yield commitment. 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

  • Optical assembly yield rate: 87.5 % (headline result)
  • Gap to yield target: -21.5 points
  • Conforming assemblies: 42 count
  • Total assemblies built: 48 count

Run it with your numbers

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

Last reviewed 2026-05-12.