Appliance Electronics & Control Boards worked example

ICT Test Capacity Calculator at 65% ict tester uptime: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop ict tester uptime to 65%, then walk the calculation through step by step. Estimate in-circuit test capacity for appliance control boards from boards per fixture cycle, available cycles, tester uptime, and passable test yield.

The inputs for this scenario

  • Boards tested per ICT fixture cycle: 2 boards/cycle (held at the documented default)
  • Available ICT fixture cycles: 1,250 cycles/shift (held at the documented default)
  • ICT tester uptime: 65 % (the input this scenario stresses; the baseline uses 90)
  • First-pass ICT yield: 96 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross ICT board capacity = boards tested per fixture cycle × available ICT fixture cycles.
  • Usable ICT test capacity works out to 1,560 boards/shift at these inputs, and this is the headline figure for the scenario.
  • Gross ICT board capacity works out to 2,500 boards/shift at these inputs.
  • Boards lost to tester downtime works out to 875 boards/shift at these inputs.
  • Boards held for debug or retest works out to 65 boards/shift at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where ict tester uptime sits at 90% and the headline result is 2,160 boards/shift, this scenario comes in 27.78% below the baseline at 1,560 boards/shift.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to ict tester uptime, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes uniform test time per board; boards with long boundary-scan or programming steps inside the ICT cell will lower effective cycles below the entered figure.

Results at a glance

  • Usable ICT test capacity: 1,560 boards/shift (headline result)
  • Gross ICT board capacity: 2,500 boards/shift
  • Boards lost to tester downtime: 875 boards/shift
  • Boards held for debug or retest: 65 boards/shift

Run it with your numbers

  • To rerun this with your own numbers, open the live ICT Test Capacity Calculator calculator, set ict tester uptime to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.