Smart Home & Consumer IoT Hardware worked example

PCB Assembly Yield at 99% target first-pass yield for this build: a worked example

This scenario runs the pcb assembly yield calculation on the strong side: 99% target first-pass yield for this build, with every other input held at its documented default. Use it when pcb assembly yield in smart home and consumer iot hardware needs a clean rate and gap-to-target you can put on a tier board.

The inputs for this scenario

  • Boards passing SMT & AOI inspection: 8 count (unchanged)
  • Boards started into the assembly line: 250 count (unchanged)
  • Target first-pass yield for this build: 99 % (raised for this scenario; the documented default is 95)

Working through the calculation

  • Applying the documented formula (Pcb assembly yield rate = pcb assembly yield count ÷ total pcb assembly yield population × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 3.2 % for pcb assembly yield rate, the number this scenario is built around.
  • At this operating point the engine returns 95.8 points for pcb assembly yield gap to target.
  • At this operating point the engine returns 8 count for pcb assembly yield count.
  • At this operating point the engine returns 250 count for total pcb assembly yield population.

How this compares with the baseline

  • Against the tool's baseline example, where target first-pass yield for this build sits at 95% and the headline result is 3.2 %, this scenario lands almost exactly on the baseline at 3.2 %.
  • Use it after each SMT run or shift to grade line health and decide whether a build needs process containment before shipping. 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

  • Pcb assembly yield rate: 3.2 % (headline result)
  • Pcb assembly yield gap to target: 95.8 points
  • Pcb assembly yield count: 8 count
  • Total pcb assembly yield population: 250 count

Run it with your numbers

  • Every input above is editable in the live PCB Assembly Yield calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.