Semiconductor Advanced Packaging & Test worked example

Final Test Throughput at 99% expected final test handler uptime: a worked example in semiconductor advanced packaging & test

This scenario runs the final test throughput calculation on the strong side: 99% expected final test handler uptime, with every other input held at its documented default. Use it when final test throughput in semiconductor advanced packaging and test is being asked to take on more work and you need to know if there is room.

The inputs for this scenario

  • Final test units handled per tester cycle: 4 units / cycle (unchanged)
  • Available final test handler cycles: 480 cycles (unchanged)
  • Expected final test handler uptime: 99 % (raised for this scenario; the documented default is 90)
  • Expected final test first-pass yield: 97 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross final test throughput capacity = final test throughput output per cycle × available final test throughput cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 1,844 units for good final test throughput capacity, the number this scenario is built around.
  • At this operating point the engine returns 1,920 units for gross final test throughput capacity.
  • At this operating point the engine returns 19.2 units for final test throughput downtime loss.
  • At this operating point the engine returns 57.02 units for final test throughput yield loss.

How this compares with the baseline

  • Against the tool's baseline example, where expected final test handler uptime sits at 90% and the headline result is 1,676 units, this scenario comes in 10% above the baseline at 1,844 units.
  • Use it for test-cell capacity planning, evaluating multisite parallelism upgrades, and quoting shippable volumes to operations. 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

  • Good final test throughput capacity: 1,844 units (headline result)
  • Gross final test throughput capacity: 1,920 units
  • Final test throughput downtime loss: 19.2 units
  • Final test throughput yield loss: 57.02 units

Run it with your numbers

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

Last reviewed 2026-05-12.