Semiconductor Advanced Packaging & Test worked example

Handler Utilization at 68% target handler utilization rate: a worked example

This worked example runs the handler utilization numbers for a tougher week than the baseline: 68% target handler utilization rate instead of the typical 95%. Estimate handler utilization for semiconductor advanced packaging and test using production-ready inputs so teams can track KPI performance and decide whether corrective action is needed.

The inputs for this scenario

  • Handlers actively running production: 8 count (held at the documented default)
  • Total handler fleet installed: 250 count (held at the documented default)
  • Target handler utilization rate: 68 % (the input this scenario stresses; the baseline uses 95)

Working through the calculation

  • The calculation starts from the formula this tool documents: Handler utilization rate = handler utilization count ÷ total handler utilization population × 100.
  • Handler utilization rate works out to 3.2 % at these inputs, and this is the headline figure for the scenario.
  • Handler utilization gap to target works out to 64.8 points at these inputs.
  • Handler utilization count works out to 8 count at these inputs.
  • Total handler utilization population works out to 250 count at these inputs.

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. 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

  • Handler utilization rate: 3.2 % (headline result)
  • Handler utilization gap to target: 64.8 points
  • Handler utilization count: 8 count
  • Total handler utilization population: 250 count

Run it with your numbers

  • To rerun this with your own numbers, open the live Handler Utilization calculator, set target handler utilization rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.