Appliance Electronics & Control Boards calculator

Functional Test Yield Calculator Calculator

Functional test yield shows whether completed control boards are passing the appliance-specific electrical, relay, display, sensor, motor-drive, and firmware checks expected by the OEM. This calculator compares passed boards with tested boards and shows the gap to the target yield.

What this calculator does

  • Calculate appliance control board functional test yield from passed boards, tested boards, and the target first-pass yield.
  • a quality or test engineer needs to track first-pass functional test performance on appliance electronic assemblies
  • Shows the first-pass functional yield and whether it is above or below the target yield for the appliance board family.

Formula used

  • First-pass functional test yield = boards passed functional test ÷ total appliance boards tested × 100
  • Yield gap to target = first-pass functional test yield - target first-pass functional yield

Inputs explained

  • Boards passed functional test: undefined
  • Total appliance boards tested: undefined
  • Target first-pass functional yield: undefined

How to use the result

  • Use it for washer controls, refrigerator boards, oven displays, motor-control boards, and service replacement boards before shipment release.
  • Yield depends on fixture health, firmware revision, component lots, solder quality, test limits, retest policy, and whether no-fault-found retests are counted consistently.

Common questions

  • What counts as a board that passed functional test? Count boards that passed all required appliance functional checks on the first pass without repair, retest, or engineering override.
  • Should ICT failures be included? Only include boards that reached the functional test step unless your site defines the metric as end-to-end final test yield.
  • What does the yield gap mean? A negative gap means yield is below target and may require defect Pareto, fixture review, supplier action, or process correction.
  • How can I use this result? Use it to monitor ramp readiness, estimate rework load, assess test escapes, and support customer quality reporting.

Last reviewed 2026-05-12.