Electronics Manufacturing worked example

SMT Line Throughput at 63% smt performance efficiency: a worked example

Suppose smt performance efficiency 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 good PCB assembly throughput from completed boards, runtime, and SMT line efficiency.

The inputs for this scenario

  • Good SMT boards completed: 2,400 boards (held at the documented default)
  • SMT line runtime: 10 hr (held at the documented default)
  • SMT performance efficiency: 63 % (the input this scenario stresses; the baseline uses 88)

Working through the calculation

  • The calculation starts from the formula this tool documents: Observed SMT board rate = good SMT boards completed รท SMT line runtime.
  • Effective SMT board throughput works out to 151 boards / hr at these inputs, and this is the headline figure for the scenario.
  • Observed SMT board rate works out to 240 boards / hr at these inputs.
  • SMT performance efficiency works out to 63 % at these inputs.
  • SMT line runtime works out to 10 hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where smt performance efficiency sits at 88% and the headline result is 211 boards / hr, this scenario comes in 28.41% below the baseline at 151 boards / hr.
  • It divides good boards completed by line runtime to get the observed board rate, then scales by performance efficiency to give a sustainable effective throughput in boards per hour. 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

  • Effective SMT board throughput: 151 boards / hr (headline result)
  • Observed SMT board rate: 240 boards / hr
  • SMT performance efficiency: 63 %
  • SMT line runtime: 10 hr

Run it with your numbers

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

Last reviewed 2026-05-12.