Semiconductor Advanced Packaging & Test worked example

Package Test Cost at 66% first-pass test coverage: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop first-pass test coverage to 66%, then walk the calculation through step by step. Estimates the final-test cost burden on packaged semiconductor devices.

The inputs for this scenario

  • Devices tested at final test: 50,000 units (held at the documented default)
  • Tester cost per second of insertion: 0.28 $/unit (held at the documented default)
  • First-pass test coverage: 66 % (the input this scenario stresses; the baseline uses 92)
  • Test program and load-board setup: 8,000 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Total = devices x tester cost per insertion x first-pass% + setup.
  • Total package test cost works out to 17,240 $ at these inputs, and this is the headline figure for the scenario.
  • Package test cost per unit works out to 0.34 $ / piece at these inputs.
  • Variable package test cost works out to 9,240 $ at these inputs.
  • Fixed package test cost adder works out to 8,000 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where first-pass test coverage sits at 92% and the headline result is 20,880 $, this scenario comes in 17.43% below the baseline at 17,240 $.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to first-pass test coverage, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It uses a flat first-pass coverage and single insertion rate, so it won't model retest loops, multi-site parallelism savings, or binning that changes effective per-good cost.

Results at a glance

  • Total package test cost: 17,240 $ (headline result)
  • Package test cost per unit: 0.34 $ / piece
  • Variable package test cost: 9,240 $
  • Fixed package test cost adder: 8,000 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Package Test Cost calculator, set first-pass test coverage to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.