Semiconductor Advanced Packaging & Test worked example

Handler Utilization at 99% target handler utilization rate: a worked example

This scenario runs the handler utilization calculation on the strong side: 99% target handler utilization rate, with every other input held at its documented default. Use it when handler utilization in semiconductor advanced packaging and test needs a clean rate and gap-to-target you can put on a tier board.

The inputs for this scenario

  • Handlers actively running production: 8 count (unchanged)
  • Total handler fleet installed: 250 count (unchanged)
  • Target handler utilization rate: 99 % (raised for this scenario; the documented default is 95)

Working through the calculation

  • Applying the documented formula (Handler utilization rate = handler utilization count ÷ total handler utilization population × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 3.2 % for handler utilization rate, the number this scenario is built around.
  • At this operating point the engine returns 95.8 points for handler utilization gap to target.
  • At this operating point the engine returns 8 count for handler utilization count.
  • At this operating point the engine returns 250 count for total handler utilization population.

How this compares with the baseline

  • Against the tool's baseline example, where target handler utilization rate sits at 95% and the headline result is 3.2 %, this scenario lands almost exactly on the baseline at 3.2 %.
  • Use it in daily or shift capacity reviews and before approving capital for additional handlers, to confirm the existing fleet is genuinely maxed out. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Handler utilization rate: 3.2 % (headline result)
  • Handler utilization gap to target: 95.8 points
  • Handler utilization count: 8 count
  • Total handler utilization population: 250 count

Run it with your numbers

  • Every input above is editable in the live Handler Utilization calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.