Appliance Electronics & Control Boards worked example

SMT Line Throughput Calculator at 63% smt line uptime: a worked example

Suppose smt line uptime falls to 63%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate usable SMT placement throughput for appliance control boards from placements per panel, panel cycles, line uptime, and first-pass assembly yield.

The inputs for this scenario

  • Control boards per SMT panel cycle: 6 boards/cycle (held at the documented default)
  • Available SMT panel cycles: 520 cycles/shift (held at the documented default)
  • SMT line uptime: 63 % (the input this scenario stresses; the baseline uses 88)
  • First-pass SMT assembly yield: 97 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross panelized board capacity = control boards per SMT panel cycle × available SMT panel cycles.
  • Usable SMT board throughput works out to 1,907 boards/shift at these inputs, and this is the headline figure for the scenario.
  • Gross panelized board capacity works out to 3,120 boards/shift at these inputs.
  • Boards lost to SMT downtime works out to 1,154 boards/shift at these inputs.
  • Boards lost to SMT defects works out to 58.97 boards/shift at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where smt line uptime sits at 88% and the headline result is 2,663 boards/shift, this scenario comes in 28.41% below the baseline at 1,907 boards/shift.
  • It computes good boards per shift by multiplying boards per panel cycle by available cycles, then derating for line uptime and first-pass assembly yield. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Usable SMT board throughput: 1,907 boards/shift (headline result)
  • Gross panelized board capacity: 3,120 boards/shift
  • Boards lost to SMT downtime: 1,154 boards/shift
  • Boards lost to SMT defects: 58.97 boards/shift

Run it with your numbers

  • To rerun this with your own numbers, open the live SMT Line Throughput Calculator calculator, set smt line uptime to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.