Payment Terminal & Retail Hardware worked example

Final Test Capacity at 99% expected test-station uptime: a worked example in payment terminal & retail hardware

What does the result look like when expected test-station uptime reaches 99%? The full calculation is worked below with real intermediate numbers. Use it when final test capacity in payment terminal and retail hardware is being asked to take on more work and you need to know if there is room.

The inputs for this scenario

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

Working through the calculation

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

How this compares with the baseline

  • Against the tool's baseline example, where expected test-station uptime sits at 90% and the headline result is 1,676 units, this scenario comes in 10% above the baseline at 1,844 units.
  • A figure at this level is achievable when expected test-station uptime is genuinely sustained, not just peaked for a shift. It applies uptime and yield as flat multipliers and assumes a single test pass — it does not model retest of failed units, which can partly recover yield loss, or fixture-specific test-time variation.

Results at a glance

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

Run it with your numbers

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

Last reviewed 2026-05-12.