Smart Home & Consumer IoT Hardware worked example

PCB Assembly Yield at 68% target first-pass yield for this build: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop target first-pass yield for this build to 68%, then walk the calculation through step by step. Estimate pcb assembly yield for smart home and consumer IoT hardware using production-ready inputs so teams can track KPI performance and decide whether corrective action is needed.

The inputs for this scenario

  • Boards passing SMT & AOI inspection: 8 count (held at the documented default)
  • Boards started into the assembly line: 250 count (held at the documented default)
  • Target first-pass yield for this build: 68 % (the input this scenario stresses; the baseline uses 95)

Working through the calculation

  • The calculation starts from the formula this tool documents: Pcb assembly yield rate = pcb assembly yield count ÷ total pcb assembly yield population × 100.
  • Pcb assembly yield rate works out to 3.2 % at these inputs, and this is the headline figure for the scenario.
  • Pcb assembly yield gap to target works out to 64.8 points at these inputs.
  • Pcb assembly yield count works out to 8 count at these inputs.
  • Total pcb assembly yield population works out to 250 count at these inputs.

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 %.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to target first-pass yield for this build, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. First-pass yield alone hides where losses occur — a low number tells you something is wrong but not whether it's paste, placement, reflow, or a bad component lot.

Results at a glance

  • Pcb assembly yield rate: 3.2 % (headline result)
  • Pcb assembly yield gap to target: 64.8 points
  • Pcb assembly yield count: 8 count
  • Total pcb assembly yield population: 250 count

Run it with your numbers

  • To rerun this with your own numbers, open the live PCB Assembly Yield calculator, set target first-pass yield for this build to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.